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1994 Toyota Paseo ENGINE IDENTIFICATION/ VALVE CLEARANCE ADJUSTMENT

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Filed Under (Toyota Manuals) by admin on 12-11-2011

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1) Disconnect PCV hose, necessary electrical connections and spark plug wires to access valve cover. Remove nuts, seal washers, valve cover and gasket. 2) Rotate crankshaft clockwise so cylinder No. 1 is at TDC on compression stroke. Cylinder No. 1 is front cylinder at timing belt end of engine. Ensure timing mark on crankshaft pulley aligns with “0″ mark on timing belt cover. 3) Ensure valve lifters on cylinder No. 1 are loose and valve lifters on cylinder No. 4 are tight. If conditions are not as described, rotate crankshaft clockwise one complete revolution (360 degrees). 4) Using feeler gauge, measure valve clearance between valve lifter and camshaft on intake valves of cylinders No. 1 and 2, and exhaust valves of cylinders No. 1 and 3. Record valve clearance. Rotate crankshaft clockwise one complete revolution (360 degrees). 5) Measure and record valve clearance on intake valves of cylinders No. 3 and 4, and exhaust valves of cylinders No. 2 and 4. Ensure valve clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS table. VALVE CLEARANCE SPECIFICATIONS TABLE (1) Application In. (mm) Exhaust Valve ………….. .012-.016 (.31-.41) Intake Valve …………… .006-.010 (.15-.25) (1) – Adjust valve clearance with engine cold. 6) If valve clearance requires adjustment, rotate camshaft so lobe on valve to be adjusted is facing upward, away from valve lifter. Position notch area on valve lifter toward inside of cylinder head. DO NOT align notch area with camshaft. Use Valve Clearance Adjuster (SST 09248-55040) to adjust valve clearance. 7) Using SST “A” of valve clearance adjuster, push downward on valve lifter. Place SST “B” between camshaft and valve lifter. See Fig. 2. Ensure enough clearance exists for adjusting shim removal. Remove SST “A”. Fig. 2: Adjusting Valve Clearance Courtesy of Toyota Motor Sales, U.S.A., Inc. 8) Using small screwdriver and magnet, remove adjusting shim. Measure and record thickness of removed shim. Using measured clearance and adjusting shim thickness, select proper replacement adjusting shim. See Figs. 4 and 5. 9) Install replacement adjusting shim. Recheck valve clearance. Apply sealant at indicated valve cover sealing areas on cylinder head. See Fig. 3. 10) Using NEW gasket, install valve cover and sealing washers. Install and tighten nuts to specification. See TORQUE SPECIFICATIONS. To install remaining components, reverse removal procedure. NEW SHIM THICKNESS TAB

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1984-1995 Honda Civic/ CRX Positive Crankcase Ventilation (PCV) System Repair Manual

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Filed Under (Honda Manuals) by admin on 22-04-2012

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The PCV system is designed to prevent blow-by gas from escaping to the atmosphere by drawing it directly into the intake manifold. The PCV valve contains a spring-loaded plunger which is lifted in proportion to intake manifold vacuum. Under high vacuum, blow-by is returned directly to the manifold through the breather chamber and PCV valve with fresh air. When intake manifold vacuum decreases (wide open throttle) and vacuum in the air cleaner increases, the PCV valve closes and the blow-by is returned through the cylinder head cover breather hose and into the air cleaner. The PCV valve also acts as a check valve when the engine backfires to prevent crankcase explosion. Fig. 1: PCV system components-1984-87 1.5L engines Fig. 2: PCV system components-1988-91 1.6L engines Fig. 3: PCV system components-1992-95 engines Fig. 4: PCV system components-1984-87 carbureted engines SERVICE Positive Crankcase Ventilation (PCV) Valve For PCV valve removal, refer to Routine Maintenance of this information. 1. Locate the PCV valve. With the engine running at idle, use pliers to pinch the PCV hose between the valve and the intake manifold. It should be possible to hear the spring loaded valve click shut. 2. If no click is heard, remove the valve from the engine but leave it connected to the intake manifold. A hissing sound should be heard and vacuum should be felt at the valve inlet. 3. If no vacuum is felt, remove the valve from the intake manifold hose. The engine should stall or almost stall. This will indicate a stuck valve or clogged hose. Check the breather hose for clogging or leaks and replace any defective parts. Exhaust Gas Recirculation (EGR) System FUEL INJECTED ENGINES General Information See Figure 3 The Exhaust Gas Recirculation (EGR) system is used to control emissions measured at the tailpipe. Components included are the EGR valve and controls. The EGR system uses a poppet type valve to regulate the amount of exhaust gas flowing into the intake manifold. The flow path is cast into the cylinder head and does not use any external tubing. A control solenoid valve regulates the amount of vacuum to the EGR valve. A Constant Volume Control (CVC) valve provides a constant amount of vacuum to the control solenoid valve over a wide range of engine vacuum. When servicing or repairing any part of the emissions system, it is absolutely essential to check for any obvious mechanical faults or failures. Remember, a trouble code only indicates which sensor or circuit is affected by the problem. Simple mechanical faults such as a vacuum leak or poor electrical connection can cause a fault code. The EGR valve is not simply open or closed but is modulated by controlling the amount of engine vacuum to the valve diaphragm, up to a maximum of 8 in. Hg of vacuum. The EGR valve has a sensor in the top of the valve that reports valve lift to the ECU (same as ECM, 1992-95). The ECU modulates the position of the control solenoid valve to control the EGR valve lift according to an internal program. Upstream of the control solenoid valve, the CVC provides a constant supply of vacuum so EGR control is precise under all manifold vacuum conditions

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2001 Ford Taurus/ Sable Cooling System Draining Filling and Bleeding Workshop Manual

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Filed Under (Ford Manuals) by admin on 19-02-2011

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CAUTION: Vehicle cooling systems are filled with Motorcraft Premium Engine Coolant VC-4-A (in Oregon VC-5, in Canada CXC-10) or an equivalent meeting Ford specification ESE-M97B44-A. NOTE: Less than 80% of the coolant capacity can be recovered with the engine in the vehicle. Dirty, rusty or contaminated coolant requires replacement. 1. Release the pressure in the cooling system by slowly turning the pressure relief cap one half to one turn counterclockwise to the first stop on the filler neck. When the pressure has been released, remove the pressure relief cap. 2. Raise and support the vehicle. For additional information, refer to Section 100-02 . 3. Remove the front splash shield. 4. Place a suitable container below the radiator draincock. Drain the coolant. 5. Close the radiator draincock when finished. Filling and Bleeding With RADKITPLUS 1. Using the special tool, install the RADKITPLUS and follow the RADKITPLUS manufacturer’s instructions to fill and bleed the cooling system. Filling Without RADKITPLUS CAUTION: Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level. When adding engine coolant, use a 50/50 mixture of engine coolant and clean, drinkable water. To maintain the integrity of the coolant and the cooling system: * Add Motorcraft Premium Engine Coolant VC-4-A (in Oregon VC-5, in Canada CXC-10) or equivalent meeting Ford specification ESE-M97B44-A. * Do not add Motorcraft Specialty Engine Coolant VC-2 or an equivalent meeting Ford specification WSS-M97B44-D. Mixing coolants may degrade the coolant’s corrosion protection. * Do not add alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing. * Do not mix with recycled coolant unless it meets the requirement of specification ESE-M97B44-A. Not all coolant recycling processes meet this specification. Use of such a coolant may harm the engine and cooling system components. 1. Install the front splash shield. 2. Lower the vehicle. 3. Fill the degas bottle with the correct engine coolant mixture. 4. Install the pressure relief cap. 5. Move the temperature blend selector to the full warm position. 6. WARNING: Do not stand in line with or near the engine cooling fan blade when revving the engine. Run the engine until it reaches operating temperature. 7. Add the correct coolant mixture to the degas bottle until the coolant level is between the COOLANT FILL LEVEL marks. 8. Turn off the engine and allow the cooling system to cool. Recheck the coolant level and fill the cooling system to the FULL mark on the degas bottle. 9. WARNING: Do not stand in line with or near the engine cooling fan blade when revving the engine. Repeat Steps 3 through 8 until the reservoir level is OK. Bleeding Without RADKITPLUS 1. Bleed the cooling system as follows: * Select the maximum heater temperature and blower motor speed settings. Position the control to discharge air from the A/C vents in the instrument panel. * WARNING: Do not stand in line with or near the engine cooling fan blade when revving the engine. Start the engine and allow it to idle. While the engine is idling, feel for hot air from the A/C vents. * CAUTION: If the air discharge remains cool and the engine coolant temperature gauge does not move, the engine coolant level is low in the engine and must be filled. Stop the engine, allow it to cool and fill the cooling system. Start the engine and allow it to idle until the normal operating temperature is reached. Hot air should discharge from the A/C vents. The engine coolant temperature gauge should maintain a stabilized reading in the middle of the NORMAL range and the upper radiator hose should feel hot to the touch. * Shut the engine off and allow it to cool. * Check the engine for coolant leaks. * Check the engine coolant level in the degas bottle and fill it as necessary.

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1999 Saturn SL1 L4-1.9L SOHC VIN 8 Engine – Driveability Concerns/ Cooling System DTC’s Set

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Filed Under (Saturn Manuals) by admin on 19-05-2012

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1. Disconnect engine coolant temperature sensor electrical connector and inspect sensor and connector terminals for corrosion and/or evidence of engine coolant. ^If terminals are corroded or if there is evidence of engine coolant proceed to step 4. ^If terminals are not corroded and there is no evidence of engine coolant, reconnect the electrical connector and continue to next step. 2. Perform one or both of the following checks to determine whether the engine coolant temperature sensor is providing the correct temperature indication. If engine coolant temperature sensor reading does not pass either of the above tests, continue with next step. ^If engine is at ambient temperature (vehicle has been sitting overnight or not started for several hours), use a Scan tool to compare the inlet air temperature ( IAT ) to the engine coolant temperature ( ECT ). These two readings should be within 2°C (4°F) of each other. ^If engine is at operating temperature, install a thermometer in the coolant recovery reservoir. With the engine running and A/C off, use a Scan tool to compare the engine coolant temperature sensor reading to the thermometer reading. These two readings should be within 8°C (15°F) of each other If engine coolant temperature sensor reading passes both of the tests above, refer to appropriate symptom diagnostic chart in the Engine/Emissions Controls Section of applicable Engine Service Manual. 3. Turn ignition off. 4Remove coolant surge tank cap. 5. Drain at least 1.9 L (2 Qt.) of engine coolant from the cooling system by opening radiator drain valve or removing engine drain plug. Collect engine coolant in a container. 6. Disconnect engine coolant temperature sensor electrical connector. 7. Remove engine coolant temperature sensor from cylinder head. 8. Obtain replacement engine coolant temperature sensor (P/N 21025106). 9. Use appropriate tap to clean sensor mounting hole of any thread sealant residue. 10. Install engine coolant temperature sensor in cylinder head. Torque: Engine Coolant Temperature Sensor: 8 Nm (71 in-lbs) 11. Inspect harness connector terminals for corrosion and/or evidence of engine coolant. If harness connector terminals are corroded or there is evidence of engine coolant, the harness connector must be replaced with new connector (P/N 12117087-includes: connector, terminals, wires, and splice sleeves). 12. Connect engine coolant temperature sensor connector. 13. Transfer engine coolant drained in step 5 into coolant surge tank. If necessary fill coolant surge tank to the FULL COLD range with 50/50 solution of correct type of antifreeze and clean water. 14. Start engine and check for leaks. 15. Run engine until upper radiator hose is hot, then add additional coolant if needed to bring the level to the FULL COLD level (1991-early 1997) or within the Min./Max. cold range (late l997-2001). 16. Install coolant surge tank cap.

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1999 Chevrolet Silverado The service engine soon light is on with trouble code P1416 present

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Filed Under (Chevrolet Manuals) by admin on 07-05-2012

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Tests/Procedures: 1. Use a scanner and command the air pump on with the engine running at idle. Check if the O2 sensors go lean. 2. If the O2 sensor does not go lean on one bank, see if the check valve at the exhaust manifold is stuck closed, not allowing air into the manifold. Potential Causes: Defective Check Valve Diagnostic Codes: P1416 Author: Christopher Pittman Average Reported Mileage: 85812 Confirmed Fix Summary Confirmed Fix 18 – Air Injection Reaction (AIR) Check Valve 1 – Air Injection Reaction (AIR) Check Valve, Air Injection Reaction (AIR) Pump Confirmed Fix Details Tech Reported Fix Details Confirmed Fix Lee Stroup Sr. November 15, 2007 2001 Chevrolet Silverado 1500, 5.3L, Vin T, Eng Cfg V8 * A.I.R. Check Valve – removed check valves, found one rusted closed, one restricted, replaced both valves. Moisture from exhaust seems to have rusted both valves. Air Injection Reaction (AIR) Check Valve Paul Puleo August 20, 2009 1999 Chevrolet Camaro, Z28 5.7L * Replaced Both Air Injection Reaction (AIR) Check Valves – bank 2 AIR check valve restrticted, bank 1 slightly restricted replaced both Air Injection Reaction (AIR) Check Valve SouthGate January 05, 2009 2000 Chevrolet Silverado 1500, 4.8L, Vin V, Eng Cfg V8 * Replaced Air Injection Reaction (AIR) Check Valve – replaced boht check valves. fix the code. Air Injection Reaction (AIR) Check Valve Dwight Heckman July 31, 2008 2000 Chevrolet Blazer, 4.3L * Check Valve – replacing the check valve and cleaning out the lines repaired the problem. Air Injection Reaction (AIR) Check Valve Nick Secchitano June 16, 2009 2000 Chevrolet Silverado 1500, 5.3L, Vin T, Eng Cfg V8 * Replaced Both Air Injection Reaction (AIR) Check Valves – Air injection check valves Air Injection Reaction (AIR) Check Valve Mark Bertelsen 1998 Chevrolet Camaro, Z28 5.7L * Replaced Air Injection Reaction (AIR) Check

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Honda Civic/ CRX Positive Crankcase Ventilation (PCV) System OPERATION MANUAL

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Filed Under (Honda Manuals) by admin on 28-01-2012

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The PCV system is designed to prevent blow-by gas from escaping to the atmosphere by drawing it directly into the intake manifold. The PCV valve contains a spring-loaded plunger which is lifted in proportion to intake manifold vacuum. Under high vacuum, blow-by is returned directly to the manifold through the breather chamber and PCV valve with fresh air. When intake manifold vacuum decreases (wide open throttle) and vacuum in the air cleaner increases, the PCV valve closes and the blow-by is returned through the cylinder head cover breather hose and into the air cleaner. The PCV valve also acts as a check valve when the engine backfires to prevent crankcase explosion. Fig. 1: PCV system components-1984-87 1.5L engines Fig. 2: PCV system components-1988-91 1.6L engines Fig. 3: PCV system components-1992-95 engines Fig. 4: PCV system components-1984-87 carbureted engines
SERVICE Positive Crankcase Ventilation (PCV) Valve For PCV valve removal, refer to Routine Maintenance of this information. 1. Locate the PCV valve. With the engine running at idle, use pliers to pinch the PCV hose between the valve and the intake manifold. It should be possible to hear the spring loaded valve click shut. 2. If no click is heard, remove the valve from the engine but leave it connected to the intake manifold. A hissing sound should be heard and vacuum should be felt at the valve inlet. 3. If no vacuum is felt, remove the valve from the intake manifold hose. The engine should stall or almost stall. This will indicate a stuck valve or clogged hose. Check the breather hose for clogging or leaks and replace any defective parts. Exhaust Gas Recirculation (EGR) System FUEL INJECTED ENGINES General Information See Figure 3 The Exhaust Gas Recirculation (EGR) system is used to control emissions measured at the tailpipe. Components included are the EGR valve and controls. The EGR system uses a poppet type valve to regulate the amount of exhaust gas flowing into the intake manifold. The flow path is cast into the cylinder head and does not use any external tubing. A control solenoid valve regulates the amount of vacuum to the EGR valve. A Constant Volume Control (CVC) valve provides a constant amount of vacuum to the control solenoid valve over a wide range of engine vacuum.

1998 Chevrolet Blazer Engine Oil Cooler Hose/ Pipe Removal And Installation Manual

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Filed Under (Chevrolet Manuals) by admin on 22-05-2012

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Removal Procedure 1. Remove the steering linkage shield. Refer to Steering Linkage Shield Replacement in Steering Linkage. Important: Have a drain pan ready for the engine oil to drain into. 2. Remove the bolt attaching the engine oil cooler lines to the remote (frame mounted) oil filter adapter. 3. Remove and discard the seals. 4. Remove the engine oil cooler line retaining rings from the engine oil cooler line quick connectors at the radiator engine oil cooler inlet and outlet. Follow the next two steps for the proper retaining ring removal procedure. 5. Using a bent-tip screwdriver or equivalent, pull on one of the open ends of the retaining ring in order to rotate the retaining ring. 6. Rotate the retaining ring around the quick connector until the retaining ring is out of position and can be completely removed. Discard the retaining rings. 7. Remove the engine oil cooler lines from the quick connectors at the radiator engine oil cooler inlet and outlet. Pull the lines straight out from the connectors. 8. Remove the remote engine oil filter lines support clamp bolt. Important: Have a drain pan ready for the engine oil to drain into. 9. Remove the bolt attaching the remote engine oil filter lines to the remote (frame mounted) engine oil filter adapter. 10. Hold the remote engine oil filter lines below the remote engine oil filter lines (engine mounted) adapter to drain the engine oil. 11. Remove and discard the seals. 12. Remove the bolt attaching the remote engine oil filter lines to the remote engine oil filter lines (engine mounted) adapter. 13. Remove and discard the seals. 14. Clean all of the components in a suitable solvent, and dry them with compressed air. 15. Inspect the fittings, the connectors, the cooler lines, the cooler, the filter lines, and the remote filter adapter for damage, distortion, or restriction. Replace parts as necessary. 16. Flush the engine oil cooler, the engine oil cooler lines, the remote engine oil filter adapter, and the remote engine oil filter lines with the same type of engine oil normally circulating through the engine. Installation Procedure

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1999 Volkswagen New Beetle GL timing belt replacement manual

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Filed Under (Volkswagen Manuals) by admin on 21-06-2012

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REMOVAL & INSTALLATION NOTE: For 2004, manufacturer does not provide a timing belt replacement interval. CAUTION: This application is an interference engine. Do not rotate camshaft or crankshaft when timing belt is removed, or engine damage may occur. NOTE: Engine code AEG is stamped into machined pad on front of cylinder block above crankcase breather, near cylinder head mating surface. See Fig. 1 . For all other 2.0L engines, engine code is stamped on transmission mating flange at the rear of the engine. See Fig. 2 . For all engines, code can also be found on the vehicle data plate and on a sticker on the timing belt cover. Fig. 2: Locating Engine Identification Code (AVH, AZG, BDC & BEV) Courtesy of VOLKSWAGEN UNITED STATES, INC. TIMING BELT Removal (AEG, AVH, AZG, BEV & BDC Engine Codes) 1. Remove right hand insulation tray from engine compartment. Remove engine cover. Rotate serpentine belt tensioner clockwise to relieve belt tension. Remove serpentine belt. See Fig. 3 . Lock in place using Mandrel (T10060) or a drift. Fig. 3: Releasing Serpentine Belt Tensioner Courtesy of VOLKSWAGEN UNITED STATES, INC. 2. Remove serpentine belt tensioner assembly. See Fig. 4 . Turn crankshaft to TDC position. See Fig. 5 . Align TDC marks visible in bellhousing access hole. See Fig. 6 . Remove upper timing belt cover. Ensure camshaft sprocket timing mark aligns with mark on rear cover. See Fig. 5 . 3. Support engine from above or below with floor jack to take engine weight off of mounts. Remove coolant reservoir and set aside. On Golf and Jetta, remove power steering reservoir (hoses attached), and set aside. On New Beetle, pull off EVAP hoses at EVAP canister and throttle valve housing. 4. On all models, remove engine mount from timing belt end of engine. See Fig. 7 . Remove crankshaft pulley from crankshaft sprocket. It is NOT necessary to remove center bolt (center bolt is torque-to-yield type that must be replaced if removed). 5. Remove timing belt covers. Remove engine support from front of engine. See Fig. 4

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EDELBROCK ENGINE MOUNT ADAPTER PLATES For Converting Small Block Chevy Applications to LS1 INSTALLATION INSTRUCTIONS

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Filed Under (Chevy Manuals) by admin on 27-12-2011

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PRE-INSTALLATION PROCEDURE General Motors vehicles came with many different engine and transmission combinations. This section is intended to verify that all the correct components are in place prior to installation. If the vehicle is currently equipped with a small block Chevrolet V8, then the engine isolator for the current application will work with the Edelbrock Adaptor plates. See the next page for further notes on various applications. A-BODY APPLICATIONS: 1964 – 1967: Vehicles that are being converted from six cylinder or a non-Chevrolet engine can use engine frame stands for the 283 to 327 from a salvage yard or reproduction suppliers such as OPGI and Yearone; engine isolators can be of the OEM rubber type from a parts supplier or polyurethane safety mounts from Energy Suspension: part #3.1114 (zinc plated), or #3.1115 (chrome). 1964 – 1967 applications will require mildly slotting the engine frame stand mounting holes, as shown in Figures 1 and 2. FIGURE 1 FIGURE 2 – 1968 – 1972: From 1968 to 1972, Chevrolet used two different frame stands with matching engine isolators. Type one is the 307 (and some early 1968 327′s), while type two includes all engines from the later 1968 327′s through to the 454, encompassing all engine sizes in-between. If you have obtained frame stands from another vehicle, use the following procedure to identify your mount system: measure the ears of the engine isolator where the engine mounting bolt goes, the inside dimension is 2 5/8″for the 307 cid (Figure 3) and 2 3/8″for the larger sized engine (Figure 4). Frame stands for the late 327,350 to 454 are also available from reproduction suppliers such as OPGI and Yearone, engine isolators can be of the OEM rubber type from a parts supplier or polyurethane safety mounts from Energy Suspension: part #3.1114 (zinc plated) #3.1115 (chrome) for the 307, part #3.1117 (zinc plated) or #3.1118 (chrome) for the late 327 to the 454. FIGURE 3 (307) FIGURE 4 (350 et al) F-BODY AND X-BODY APPLICATIONS: 1967 – 1969 F-body and 1968 – 1974 X-body: Vehicles that are being converted from six cylinder or a non-Chevrolet engine will require engine isolators that match the engine frame stand. There are a variety of styles depending on engine size and model year, so get the engine isolators and frame stands which are available from reproduction suppliers such as Classic Industries and Yearone. Engine isolators can be of the OEM rubber type from a parts supplier or polyurethane safety mounts from Energy Suspension. There are two basic types of engine isolators; to identify them measure the distance between the tab for the engine mount through bolt, if it is 2-5/8″use Energy Suspension #3.1114 (zinc plated) #3.1115 (chrome), if the distance is 2-3/8″use #3.1117 (zinc plated) #3.1118 (chrome).

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1998 Pontiac Grand Prix DTC P0753 1-2 Shift Solenoid Circuit Electrical Repair Manual

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Filed Under (Pontiac Manuals) by admin on 07-06-2012

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Test Description The numbers below refer to the step numbers on the diagnostic table. 6. This step isolates the fault between the engine harness and the transmission harness. 8. This step verifies that circuit 1222 is neither open nor shorted to power. 11. This step verifies that the 1-2 shift solenoid has neither shorted across its windings nor increased its resistance. DTC P0753 1-2 Shift Solenoid Circuit– Electrical Step Action Value(s) Yes No 1 Was the Powertrain On-Board Diagnostic (OBD) System Check performed? — Go to Step 2 Go to Powertrain On Board Diagnostic (OBD) System Check 2 1. Install the Scan Tool . 2. Turn the ignition switch to the RUN position. Important Before clearing the DTCs, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. 3. Record the DTC Freeze Frame and Failure Records, then clear the DTC. — Go to Are DTCs P0758, P1860 or P0740 set? Step 3 Go to Step 6 3 1. Remove the TCC fuse. 2. Inspect the fuse for an open. Was a condition found and corrected? — Go to Step 4 Go to Step 5 4 Repair short to ground in engine harness circuit 1339 or transmission harness circuit 839. Refer to General Electrical Diagnosis Procedures . Was a condition found and corrected? — Go to Step 21 — 5 Repair the open in engine harness circuit 1339 or transmission harness circuit 839. Refer to General Electrical Diagnosis Procedures . Was a condition found and corrected? — Go to Step 21 — 6 1. Turn the ignition switch OFF. 2. Disconnect the Automatic Transmission 7-way connector. 3. Install the J 38835 Transmission Electrical Jumper on the engine harness connector. 4. Connect a test lamp from terminal E to terminal A of the jumper using a J 35616-A Connector Test Adapter Kit. Important Additional DTCs will set. 5. With the engine OFF, turn the ignition ON. Is the test lamp ON? — Go to Step 7 Go to Step 8 7 Inspect engine harness circuit 1222 for a short to ground. Refer to General Electrical Diagnosis Procedures . Was a condition found and corrected? — Go to Step 21 Go to Step 20 8 Using the scan tool command the 1-2 solenoid ON and OFF three times. Does the test lamp cycle ON and OFF as commanded? — Go to Step 11 Go to Step 9 9 Inspect engine harness circuit 1222 for an open. Refer to General Electrical Diagnosis Procedures . Was a condition found and corrected? — Go to Step 21 Go to Step 10 10 Inspect engine harness circuit 1222 for a short to power. Refer to General Electrical Diagnosis Procedures . Was a condition found and corrected? — Go to Step 21 Go to Step 19 11 1. Turn the ignition OFF. 2. Disconnect the J 38835 Transmission Electrical Jumper from the engine harness. 3. Connect the J 38835 Transmission Electrical Jumper to the Automatic Transmission 7-way connector. 4. Connect a J 39200 Digital Multimeter (DMM) from 19 ohms to 31 ohms terminal E to terminal A of the jumper. Is the measured resistance within the specified range? Go to Step 15 Go to Step 12 12 Is the resistance greater than the specified value? 31 ohms Go to Step 13 Go to Step 15 13 Inspect the transmission harness RED wire circuit 839 and the LT GRN wire circuit 1222 for an open. Refer to General Electrical Diagnosis Procedures . Was a condition found? — Go to Step 14 Go to Step 18 14 Replace the Automatic Transmission Wiring Harness. Refer to Solenoids and Wiring Harness Replacement . Is the replacement complete? — Go to Step 21 — 15 Connect the J 39200 Digital Multimeter from terminal A of the jumper to ground. Is the resistance less than the specified value? 100 ohms Go to Step 16 Go to Step 18 16 Inspect the transmission harness LT GRN wire circuit 1222 for a short to ground or short to power. Refer to General Electrical Diagnosis Procedures . Was a condition found? — Go to Step 17 Go to Step 18 17 Replace the Automatic Transmission Wiring Harness. Refer to Solenoids and Wiring Harness Replacement . Is the replacement complete? — Go to Step 21 — 18 Replace the 1-2 Shift Solenoid Valve Assembly. Refer to Solenoids and Wiring Harness Replacement . Is the replacement complete? — Go to Step 21 — 19 Inspect PCM connector C1 (Blue) for bent, damaged or backed out connector pins. Was a condition found and corrected? — Go to Step 21 Go to Step 20 20 Replace the PCM. Refer to PCM Replacement/Programming . Is the replacement complete? — Go to Step 21 — 21 In order to verify your repair, perform the following procedure: 1. Using the scan tool, clear DTCs. 2. Operate the vehicle under the following conditions: { The engine speed is more than 500 RPM. { The vehicle is not in fuel shut off. { System voltage is 10-16 volts. { Drive the vehicle through the 1-2 shift. { When the 1-2 SS Valve Assembly is commanded ON, the voltage decreases to zero. { When the 1-2 SS Valve Assembly is commanded OFF, the voltage increases to B+. { All conditions are met for 5 seconds.

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