My 2001 Pontiac Grand Am 3.4L started dying while driving down the road head scan done through an EVAP code and a random misfire code replaced ignition module all three coil packs spark plugs and wires and problem persisted had mechanic friend put a fuel pressure test iron it and it was way off Granite 47 PSI idling supposed to be I think 52 and while driving when you press on the gas the fuel pressure would actually go down so I replace the fuel filter just got done now car will not start turn the key and you can hear the fuel pump kick in and you can hear the relay click over but car still will not start this is my work vehicle I need help
After you replace the fuel filter you need to cycle the ignition key ON and OFF 10 times. Each time holding the key in the ON position for 5 seconds and repeat. This will prime the fuel system since the new fuel filter is installed empty. It should run after that but the fuel pressure should be rechecked. If it still goes down like before, you may need to replace the fuel pressure regulator and or the fuel pump itself.
Fuel Pressure Regulator Replacement
- Relieve the fuel system pressure.
- Disconnect the fuel pressure regulator vacuum line.
- Remove the fuel pressure regulator attaching screw.
- Using a shop towel to catch any spilled fuel, lift and twist the fuel pressure regulator in order to remove the fuel pressure regulator from the fuel rail.
- Remove the retainer and spacer bracket from the rail and discard.
- Remove the fuel pressure regulator from the engine fuel return pipe.
- Remove the fuel pressure regulator inlet O-ring and the fuel return pipe O-ring and discard.
Warning! Connect the fuel return line before tightening the regulator attaching screw in order to prevent the regulator from rotating. Rotation of the regulator could damage the retainer and spacer bracket and lead to a fuel leak at the regulator inlet.
• Do not use compressed air in order to test or clean a fuel pressure regulator as damage to the fuel pressure regulator may result.
• Clean the fuel pressure regulator filter screen with gasoline if necessary.
• Do not immerse the fuel pressure regulator in a solvent bath in order to prevent damage to the fuel pressure regulator.
•Inspect the filter screen for contamination. If contaminated, replace the fuel pressure regulator.
•Lubricate the new pressure regulator inlet O-ring with clean engine oil and install on the regulator inlet.
•Lubricate the new fuel return pipe O-ring with clean engine oil.
•Install the fuel return pipe O-ring.
•Connect the fuel return pipe to the regulator.
•Install the new retainer and spacer bracket into the slot on the fuel rail.
Caution! Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
- Install the pressure regulator to the fuel rail.
Tighten the fuel return pipe fitting to 17 N·m (13 lb ft).
- Connect the fuel pressure regulator vacuum line.
- Install the pressure regulator attaching screw.
Tighten the pressure regulator attaching screw to 8.5 N·m (75 lb in).
- Inspect and verify that the retainer and spacer bracket is engaged in the slots in the fuel rail. Grasp and pull on the regulator to ensure that the regulator is properly seated.
- Connect the negative battery cable.
- Inspect the fuel leaks using the following procedures:
- Turn ON the ignition, with the engine OFF for 2 seconds.
- Turn OFF the ignition for 10 seconds.
- Turn ON the ignition, with the engine OFF.
- Inspect for fuel leaks.