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1998 Dodge Grand Caravan Fuel Pump Relay Removal And Installation Manual

Fuel Pump Relay 1. Remove fuel pump relay from power distribution center at driver’s side front corner of engine compartment, near the battery. Note terminal identification on fuel pump relay. See Fig. 6 . 2. To check fuel pump relay resistance, use ohmmeter and check resistance between terminals No. 85 and 86 on fuel pump relay. Replace fuel pump relay if resistance is not 70-80 ohms. 3. To check fuel pump relay operation, connect ohmmeter between terminals No. 30 and 87A on fuel pump relay. See Fig. 6 . Ohmmeter should indicate continuity between terminals No. 30 and 87A on fuel pump relay. 4. Connect ohmmeter between terminals No. 30 and 87 on fuel pump relay. See Fig. 6 . Ohmmeter should indicate no continuity between terminals No. 30 and 87 on fuel pump relay. 5. Connect 16-gauge jumper wire between negative battery terminal and terminal No. 85 on fuel pump relay. Connect 16-gauge jumper wire between positive battery terminal and terminal No. 86 on fuel pump relay. 6. Fuel pump relay should now be energized. No continuity should now exist between terminals No. 30 and 87A on fuel pump relay. Continuity should now exist between terminals No. 30 and 87 on fuel pump relay. Disconnect jumper wires. Replace fuel pump relay if defective. 7. If fuel pump relay or wiring circuit failure exists, a Diagnostic Trouble Code (DTC) will be stored in Powertrain Control Module (PCM). See appropriate G – TESTS W/CODES article. Fig. 6: Identifying ASD Relay & Fuel Pump Relay Terminals Courtesy of CHRYSLER CORP.


Removal & Disassembly Remove engine front cover. See FRONT COVER & TIMING CHAIN under REMOVAL & INSTALLATION. Using an impact driver and a T-30 Torx bit, remove and discard oil pump cover plate screws. Remove cover plate and rotors. See Fig. 11 . To remove oil pump relief valve, use a slide hammer and Relief Valve Puller Adapter (SA9103E). Inspection Replace rotors if worn or damaged. Using feeler gauge and straightedge (at cover plate), measure oil pump clearances. See OIL PUMP SPECIFICATIONS table. If clearances are not as specified, replace rotors or entire pump assembly as necessary. Reassembly & Installation Install rotors with chamfer facing away from engine. Install new relief valve (if removed). Pack pump rotors with petroleum jelly to prime pump. Install pump cover plate using new screws. Tighten screws to specification. See TORQUE SPECIFICATIONS . OIL PUMP SPECIFICATIONS NOTE: If oil pump relief valve is removed, DO NOT reuse it. Application In. (mm) Outer Rotor-To-Housing .006-.011 (.150-.277) Outer Rotor Tip-To-Inner Rotor Tip .006 (.150) Rotor Gear-To-Pump Cover Plate

Rotary Fuel Pumps Timing to engine steps

SMALL | MEDIUM | LARGE Previous Next Fuel Injection Pump (Distributor Type) The fuel injection pumps, Bosch® VE, Lucas CAV DPA, Stanadyne DB4, Lucas CAV DPS, and Delphi DP210, are rotary distributor pumps. These pumps perform the four basic functions of: 1. Producing the high fuel pressure required for injection 2. Metering the exact amount of fuel for each injection cycle 3. Distributing the high-pressure, metered fuel to each cylinder at the precise time 4. Varying the timing relative to engine speed. SMALL | MEDIUM | LARGE Previous Next Distributor-Type Pump Governor Balance between the governor flyweights and control lever position controls the metering of the amount of fuel to be injected. The fuel injection pump governor performance and setting can affect engine power. Special equipment and qualified personnel are required to verify governor performance. If the seals are broken on the external Bosch® VE adjustment screw, the fuel rate can, perhaps, be out of adjustment The Lucas CAV DPA/DPS fuel injection pump uses a coded spring connection to change the governor setting. Incorrect connection of the governor spring can affect performance. Adjustments and rating changes are described in the Master Repair Manual, Injector Pumps and Injectors, Manual Shutdown Levers Both fuel injection pumps are equipped with mechanical shutdown levers. These levers are spring-loaded in the run position. Not all applications will use these manual shutdown controls and there will be no cable or rod connected to the lever. NOTE: Partial actuation of the mechanical shutdown levers will affect fuel flow and engine power. SMALL | MEDIUM | LARGE Previous Next Advance Timing Mechanism Regulated pressure produced by a vane supply pump in both fuel injection pumps is used to advance the timing as the engine speed increases. A return spring is used to retard the timing as the engine speed is reduced. If a spring breaks, the timing will go to the advance position, resulting in torque loss, fuel knock, and possible engine overheating. Retarded (late) timing will result in torque loss, high fuel consumption, and white to black smoke. SMALL | MEDIUM | LARGE Previous Next The Lucas CAV DPA/DPS advance timing mechanism uses a check ball in the circuit which, if omitted during assembly, will result in no timing advance. If the fuel injection pump has been replaced or the mechanism has been removed to fix a leak, the problem can be that the check ball is missing


ENGINE 7.3L DIESEL DI HIGH PRESSURE OIL PUMP LEAK ACTION sensor electrical connector. High pressure oil pump leaks at the outlet fittings b. Remove the exhaust back pressure sensor. and/or end plug can be serviced without removing the pump assembly. Replace the O-rings on the 3. Remove the high pressure oil pump reservoir. fittings and the end plug using Kit 2C3Z-9G804-AA. For additional information, refer to Section All three (3) O-rings should be replaced. Apply 303-04 in the appropriate Workshop Manual. liquid thread sealer (included in the kit) prior to WARNING reinstallation. Refer to the following Service Procedure for details. SMOKING OR OPEN FLAME OF ANY TYPE MUST NOT BE PRESENT WHEN WORKING SERVICE PROCEDURE NEAR FUEL VAPOR. NOTE CAUTION BEFORE PERFORMING THE REPAIR THE FUEL SYSTEM CONTAINS PRESSURIZED PROCEDURE, MAKE SURE THAT THE CAUSE FUEL AFTER THE VEHICLE IS SHUT DOWN OF THE LEAK IS CLEARLY ESTABLISHED. AND WILL MAINTAIN THIS PRESSURE FOR A LONG PERIOD OF TIME. NOTE FOR E-SERIES AND F650/750 VEHICLES, 4. Open the fuel/water separator drain valve to FOLLOW THE PROPER HIGH PRESSURE OIL release fuel pressure. Completely drain the fuel PUMP ACCESS PROCEDURE IN THIS filter/water separator assembly. DOCUMENT FOR ACCESS TO THE HIGH 5. Disconnect the fuel supply and fuel return lines PRESSURE OIL PUMP. from the fuel filter/water separator. NOTE 6. Disconnect the two (2) cylinder head fuel FOR SUPER DUTY AND EXCURSION, PROCEED supply lines from the fuel filter/water separator

2002 BMW 325I 2.5L Air Pump Repair manual

Check engine light on and fault codes stored. Vehicle running normally. Tests/Procedures: 1. Based upon stored fault codes for secondary air system, there is little or no flow of secondary air into engine. Typical causes for this issue are failed secondary air pumps and/or secondary air check valves. Secondary air pump should operate under normal circumstances when vehicle is first started to perform system test. Pump will normally be heard running when standing in front right corner of vehicle. 2. The secondary air pump is located in the right front of engine compartment. A secondary air pump relay located in the glove box is controlled by the engine control module and sends power to the secondary air pump. 3. Air pump can be disconnected and supplied with power and ground at pump to verify operation is possible. 4. Check valve on front right of cylinder head can be supplied with vacuum and visually checked for opening of valve. 5. Vacuum line from check valve to operating solenoid should also be inspected for cracks or being disconnected. Vacuum line follows right side of cylinder head to back of cylinder head to the secondary air solenoid located under left rear side of intake manifold. 6. The solenoid should allow vacuum flow to the check valve during vacuum pump operation. The solenoid is controlled directly by the engine control module and receives power during key-on-engine-off. Potential Causes: A.I.R. Check Valve Engine Control Module (ECM) Codes — Engine control module fault. Defective Secondary Air Pump Secondary Air Pump Relay Secondary Air Supply Hose Broken Vacuum Line