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1993 Ford Crown Victoria V8-281 4.6L SOHC Engine – Lean Driveability Symptoms Manual

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1. Look at the BARO PID. Refer to the Barometric Pressure Reference Chart in this article. At sea level, BARO should read about 159 Hz (29.91 in. Hg). As a reference, Denver, Colorado at 1524 meters (5000 ft.) altitude should be about 144 Hz (24.88 in.Hg). Normal learned BARO variability is up to +/- 6 Hz (+/- 2 in. Hg.). If BARO indicates a higher altitude than you are not at (7 or more Hz lower than expected), you may have MAF contamination. If available, Service Bay Diagnostic System (SBDS) has a Manifold Absolute Pressure (MAP) sensor that can be used as a barometric pressure reference. Use “MAP/BARO” test under “Powertrain,” “Testers and Meters.” Ignore the hookup screen. Connect GP2 to the reference MAP on the following screen. 2. On a fully warmed up engine, look at Long Term Fuel Trim at idle, in Neutral, A/C off, (LONGFT1 and/or LONGFT2 PIDs). If it is more negative than -12%, the fuel system has learned lean corrections which may be due to the MAF sensor over-estimating air flow at idle. Note that both Banks 1 and 2 will exhibit negative corrections for 2-bank system. If only one bank of a 2-bank system has negative corrections, the MAF sensor is probably not contaminated. 3. On a fully warmed up engine, look at MAF voltage at idle, in Neutral, A/C off (MAF V PID). If it’s 30% greater than the nominal MAF V voltage listed in the Powertrain Control/Emissions Diagnosis (PC/ED) Diagnostic Value Reference Charts for your vehicle, or greater than 1.1 volts as a rough guide, the MAF sensor is over-estimating air flow at idle. 4. If at least tow of the previous three steps are true, proceed to disconnect the MAF sensor connector. This puts the vehicle into Failure Mode and Effects Management (FMEM). In FMEM mode, air flow is inferred by using rpm and throttle position instead of reading the MAF sensor. (In addition, the BARO value is reset to a base/unlearned value.) If the lean driveability symptoms go away, the MAF sensor is probably contaminated and should be replaced. If the lean driveability symptoms do not go away, go to the PC/ED Service Manual for the appropriate diagnostics.

2005-2006 Toyota Tundra/ Sequoia 4.7L V8 MR Tech Power-flow Intake system Installation Manual

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The installation of this cold air intake does require mechanical skills. Removal of engine covers, air lines and removing several plastic plugs and screws that may be difficult. It is recommended that this system be installed by a professional mechanic. Be sure to disconnect the negative terminal before proceeding. Congratulations! You have just purchased the worlds first tuned intake system. MR Technology, Leading the way! Patent pending (A) and (G) (B) (D) (A) Power-Box contents: POWER-FLOW: An air intake evolution Tools required: 1- 8mm socket 1- 10mm socket 1- 12mm socket 1- Phillips screw driver 1- 8mm nut driver 1- 55mm allen wrench 1- Disc grinder or Dremel (C) (E) Figure 1 Figure 2 Carefully, remove the mass air flow sensor from the air sensor housing to be reused later in the instruc- tions. Unhook three spring clamps from the top air box cleaner. Once the hooks have been removed, continue to detach the air box top from the lower air box cleaner. See fig. 15 for better illustration. Once the nut and bolt have been removed, continue to remove the entire hose clamp. Unplug the electrical harness clip from the mass air flow sensor as shown above. Disconnect the 4mm vacuum line located to the side of the air box cleaner. Unscrew the nut and bolt the hose clamp that secures the hose over the radiator. Loosen the two flange nuts on the engine cover in order to remove the cover. Disconnec the 6mm vacuum hose that will be reused later in the instructions. Page 2 of Part# PF2019 Unscrew the two screws from the mass air flow sensor, shown above. Loosen the hose clamp on the air duct connected to the throttle body. Unplug the crank case breather hose from the air crank case port as shown above. >>> >>>> Figure 3 Figure 8 Figure 7 Figure 6 Figure 11 Figure 10 Figure 9 Figure 14 Figure 13 Figure 12 >>>> Figure 4 Figure 5 Once the flange nuts have been removed, continue to remove the cover from the engine compartment as shown above. >>> >>> >>> >>> >>> >>> The three spring clamps shown above are unhooked from the top air box cleaner (A). Remove the air filter panel once the top has been removed (B). Once the air filter panel is removed, there are three bolts that will be removed in order to detach the lower air box cleaner. Remove the entire lower air box cleaner from the engine compartment. Place the power bands over each end of the silicone elbow. press the short end of the silicone elbow over the throttle body. Once the silicone elbow has been aligned continue to semi-tighten power band over the throttle body end. The first vibra-mount is aligned to the pre-tapped hole located behind the head lamp. The first vibra-mount is now installed as shown above. Screw the second vibra-mount is aligned over the wheel well bracket. The second vibra-mount is now installed as shown above. The stock 6mm hose is removed from the fuel pressure regulator. Press the new 16″- 4mm vacuum hose over the fuel pressure regulator port. Page 3 of Part# PF2019 Figure 15 Figure 17 Figure 16 Figure 20 Figure 19 Figure 18 Figure 23 Figure 26 Figure 25 Figure 22 Figure 21 Figure 24 (B) (A) (A) (A) >>> >>> >>> >>> Both vibra-mounts are now installed, you are now ready to go on to the next step. Place one .462 and a .412 power band over the silicone step hose. Press the 3 3/4″ side over the velocity stack as shown above. The Power box is now sitting flush over the vibra- mounts and a fender washer is placed over each vibra-mount. The last m6 flange nut is placed over the vibra- mount located behind the Power box. The 65mm bolt is tightened with an allen wrench. The assembled power box is lowered into the engine compartment. Align the mounting points on the bracket arms over the vibra-mounts. One 45mm bolt is removed from the top of the box. The bracket is place under the Power box and the 45mm bolt is aligned and screwed back in place as shown above. Remove the 65mm bolt from the velocity stack base. Align the bracket to the hole and insert the 65mm bolt back in place

1999 GMC Truck Yukon PRNDL Display Inaccurate or Inoperative PRNDL Inaccurate Repair Manual

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Did you perform the Instrument Cluster System Check? — Go to Step 2 Go to Instrument Cluster System Check 2 1. Disconnect the Transmission Range (TR) Switch connector C2. 2. Turn the ignition switch to the RUN position. 3. Conduct the PRNDL Logic Input Test by connecting fused jumper wires between ground and the appointed cavities of the TR Switch connector. Refer to PRNDL Logic Input Test PRNDL Logic Input Test . 4. Repeat for each transmission range. Do all ranges illuminate? — Go to Step 3 Go to Step 4 3 Adjust the transmission range switch. Refer to Park/Neutral Position Switch Adjustment (4L60E); Park/Neutral Position Switch Adjustment (4L80E) Automatic Transmissions. Replace the PNP Switch. Refer to Park/Neutral Position Switch Replacement (4L60E); Park/Neutral Position Switch Replacement (4L80E) in Automatic Transmissions. Is the repair complete? — Go to Instrument Cluster System Check — 4 1. Remove the I/P Cluster. 2. Connect a J 39200 DMM (continuity) between the I/P Cluster connector and connector C2 of the TR Switch to those circuit(s) that connected to the faulty PRNDL indicators. Is continuity present in the circuit(s) tested? — Go to Step 6 Go to Step 5 5 Locate and repair the open in the circuit(s) that are faulty between the TR Switch and the I/P Cluster. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? — Go to Instrument Cluster System Check — 6 Connect a J 39200 DMM (continuity) between the I/P Cluster connector and ground to those circuit(s) that connected to the faulty PRNDL indicators. Is continuity present in the circuit(s) tested? — Go to Step 7 Go to Step 8 Locate and repair the short to ground in the circuit(s) that are faulty between the TR Switch and the I/P Cluster. Refer to Wiring 7 Repairs in Wiring Systems. Is the repair complete? — Go to Instrument Cluster System Check — 8 Replace the I/P Cluster. Refer to Instrument Panel Cluster (IPC) Replacement . Is the repair complete?

GM Mass Air Flow Installation Instructions

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GM Mass Air Flow Installation Instructions Part #69126 1. Locate the factory Mass Air Flow sensor located in the air intake tube of the vehicle. 2. Remove the two screws that mount the factory Mass Air Flow Sensor to the air intake tube. 3. Install the JET Powr-Flo Mass Air Sensor in the intake tube using the factory screws that you previously removed. 4. Start vehicle and verify that the check engine light is not on. 5. Put your factory sensor away in a safe place for a spare

2005 Saab 9-3 Linear (9440) L4-2.0L Turbo Fuel Delivery and Air Induction Air Flow Meter/ Sensor Service and Repair

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1. Unplug the connector. 2. Remove the mass air flow sensor 1. Fit the mass air flow sensor with a new O-ring, sparingly lubricated with Vaseline. 2. Plug in the connector