The evaporative emission system is designed to prevent the escape of fuel vapors from the fuel
system. Leaks in the system, even small ones, can allow fuel vapors to escape into the
atmosphere. Government regulations require onboard Testing to make sure that the evaporative
(EVAP) system is functioning properly. The leak detection system tests for EVAP system leaks
and blockage. It also performs self-diagnostics. During self-diagnostics, the Powertrain Control
Module (PCM) first checks the Leak Detection Pump (LDP) for electrical and mechanical faults.
If the first checks pass, the PCM then uses the LDP to seal the vent valve and pump air into the
system to pressurize it. If a leak is present, the PCM will continue pumping the LDP to replace
the air that leaks out. The PCM determines the size of the leak based on how fast/long it must
pump the LDP as it tries to maintain pressure in the system.
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An Applied Vehicle has a MIL “On” and has one or both of the following DTCs stored in the ECM:
- P0442 EVAP Small Leak
- P0456 EVAP Very Small Leak
ACTIONS:
- Confirm this bulletin applies.
- Perform CONSULT-II Self-Diagnosis (repair as needed).
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Fuel Pump Circuit Schematic Refer to the schematic diagram and test the system with the diagnostic chart. CHECK FUEL PUMP OPERATION IN “D-CHECK” MODE 1. Connect “Test Mode” connector. [1] 2. Turn ignition “ON.” 3. Check fuel pump for proper operation. Fuel pump should cycle on and off. [1]
Refer to “How To Display and Read Diagnostic Trouble Codes” in COMPUTERS AND CONTROL SYSTEMS.
1. Disconnect relay connector and remove relay from its bracket. 2. Measure resistance of relay coil between terminals #1 and #3. It should read 70 Ohms. 3. Connect 12V to relay coil terminals and check continuity between switching terminals. Connect battery “+” to terminal #1 and battery “-” to terminal #3. Relay should “click” when energized.
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When repairing the oil pump, the oil pan and strainer should be removed and cleaned. 1. REMOVE CRANKSHAFT TIMING PULLEY (See page EM–13) 2. 4WD: REMOVE FRONT DIFFERENTIAL (See page SA–47) 3. DRAIN ENGINE OIL 4. A/T: REMOVE OIL COOLER TUBE AND CLAMP (A340E: See page AT–24) (A340F: See page AT–30) 5. REMOVE REAR END COVER AND DUST COVER 6. DISCONNECT STARTER WIRE CLAMP 7. REMOVE CRANKSHAFT POSITION SENSOR 8. REMOVE OIL PAN (a) Remove the 17 bolts and 2 nuts. (b) Using SST and a brass bar, separate the oil pan Read the rest of this entry »

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The Moroso Dry Sump Oil Pump is designed to fit either 90° V-6, small or big block Chevrolets, and the only difference is the mounting holes. You can see that there are two sets of slotted holes on the mounting bracket, which attaches the pump to the engine block.
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Vehicle preparation:
1. Remove the negative battery cable before installing the cruise control components for safety precautions.
2. Jeep wrangler applications: remove airbag by using (3) trim tool to release metal clips as shown in figure 2. Caution: ensure that battery has been 90 seconds disconnected for more than prior to removal of airbag; failure to heed this warning may result in airbag discharge and may cause serious injury or death.
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Dual Fueler CP3 Pump Kit Installation Guide 03-07 5.9 Dodge Cummins
Engine noisy – Too Much Fuel Pressure or fuel delivery code
1) Cause: Check fuse is good and in controller’s fuse holder securely, and all power connections are secure, including connectors for both pumps are fully plugged in.
2) Lift pump pressure supplying both CP3 pumps pressure too high. Supply pressure from lift pump should not exceed 12-15 psi.
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This manual concerns about the step for removing and installing the fuel pump for 2004 Audi A4 L4-1.8L Turbo (AMB) vehicle.
Removing And Installing Fuel Pump
CAUTION: To remove the Fuel Pump (FP), the fuel tank may only be filled to a maximum of 3/4. Empty fuel tank if necessary.
Empty fuel tank
Observe safety precautions.
Observe rules for cleanliness.
CAUTION: Observe safety precautions when disconnecting the battery.
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The mounting procedure outlined below covers the 1997-2002 Jeep Wrangler. Note that a
Front Gross Axle Rating (FGAWR) of 2500 lbs. is required. A suspension upgrade and additional
ballast may be necessary. You will need to refer to the illustrations and familiarize yourself with each
of the undercarriage components and their relative position to each other. Then proceed as follows:
Begin by removing the four screws that hold the plastic “Jeep” valance in place above the
bumper. Keep these screws as they will need to be reinstalled.
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Tests/Procedures: 1. Ground the Violet/Yellow wire (disarm circuit) that goes to either front door and the theft alarm module. Have the keys out of the ignition and all doors closed when grounding the wire. This should disarm the theft alarm system and prevent the theft alarm from arming. 2. Check that the interior lights do not stay on due to the wire being grounded. If they do, the illuminated entry relay will need to be removed or another method of disabling the theft alarm will have to be used. 3. Another method if the theft alarm module is faulty would be to disconnect the module and replace the Powertrain Control Module (PCM) with a new one.
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