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3823 messages,  Last post on Oct 12, 2006 at 2:31 PM

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What is this discussion about? Chevrolet Malibu, Chevrolet Malibu Maxx, Electrical, Engine, Sedan

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#3744 of 3823 Vibrating Headlights - How to fix? by mybooo Sep 25, 2006 (7:19 am)
I was wondering, has anybody done anything to fix the shaking headlights? Thanks! Replies to this message: meandmymaxx (Sep 25, 2006 7:24 am) mybooo (Sep 25, 2006 8:48 am) mybooo (Sep 25, 2006 8:49 am) maxx4me (Sep 25, 2006 9:13 am)
#3745 of 3823 Re: Vibrating Headlights - How to fix? [mybooo] by meandmymaxx Sep 25, 2006 (7:24 am)
Replying to: mybooo (Sep 25, 2006 7:19 am) Took it to the dealer about a year ago, fixed it right up for me, no problems since. Replies to this message: mybooo (Sep 25, 2006 8:48 am) mybooo (Sep 25, 2006 8:49 am) maxx4me (Sep 25, 2006 9:13 am)
#3746 of 3823 Re: Vibrating Headlights - How to fix? [meandmymaxx] by mybooo Sep 25, 2006 (8:48 am)
Replying to: meandmymaxx (Sep 25, 2006 7:24 am) I read on here once how someone fixed theirs, and I can't find it now Replies to this message: mybooo (Sep 25, 2006 8:49 am) maxx4me (Sep 25, 2006 9:13 am)
#3747 of 3823 Re: Vibrating Headlights - How to fix? [mybooo] by mybooo Sep 25, 2006 (8:49 am)
Replying to: mybooo (Sep 25, 2006 8:48 am) I changed my search and found it! THANKS!
#3748 of 3823 Re: Vibrating Headlights - How to fix? [mybooo] by maxx4me Sep 25, 2006 (9:13 am)
Replying to: mybooo (Sep 25, 2006 8:48 am) again, I put black electrical tape around the two plastic pegs that sit in holes in the metal body. While it is better, its not perfect. I'd be curious to see what the dealer did. Can you shed any light?
#3750 of 3823 2002 malibu fuel issue by diesmart Sep 25, 2006 (12:11 pm)
I have a 2002 malibu with 119,000 miles and yesterday it just died on me no warnin just acted like it ran out of gas and quit. i checked the fuel pressure at the rail and there was none, checked the pump to find that it was not kicking on. So today i changed out the pump and filter put it all back together and still no start, no fuel at the rail no pump rnning. I checked the voltage at the relay and im getting 12v in i replaced the relay and still nothing. At the pump wiing harness i am only getting 5 volts not sure if thats god or bad but i need help cant seem to figure out where to go from here Replies to this message: 3745 (Sep 26, 2006 2:28 am) imidazol97 (Sep 26, 2006 4:14 am) diesmart (Sep 26, 2006 6:57 am) imidazol97 (Sep 26, 2006 7:26 am) and 2 more... 3745 (Sep 26, 2006 5:45 am)
#3751 of 3823 Re: 2002 malibu fuel issue [diesmart] by 3745 Sep 26, 2006 (2:28 am)
Replying to: diesmart (Sep 25, 2006 12:11 pm) I'm not too sure how that model car works but on most GM cars this is the sequence. Turn ignition on and computer closes relay which provides 12 volts to fuel pump for about 3 seconds and then switches off. The fuel rail is now primed. Crank engine. Engine starts and builds up oil pressure. Contacts on oil pressure sensor close and activates fuel pump relay again. Fuel pump now continues to run.   I would look at your oil pressure sensor. This has a set of contacts that open in the event of low oil pressure and cuts the engine off as a safety measure to prevent damage.   You should hear the pump run for about 3 seconds and then cut off before the engine is started. This is normal.
#3752 of 3823 Re: 2002 malibu fuel issue [diesmart] by imidazol97 Sep 26, 2006 (4:14 am)
Replying to: diesmart (Sep 25, 2006 12:11 pm) The 5 volts at the pump may be for the float sensor. It sounds like you're not getting 12 volts to the pump. You need to find the wiring schematic and trace the power. I would expect a fuse inline somewhere. And I'd expect 1 or 2 relays involved. I haven't checked my GM wiring manual for a different model to make a guess at how that's done.   I would check the voltage out at the relay by probing the wire when it should be hot. Then a guess is you're looking for a break in the wiring going to the back to the fuel pump.   Before R&R the pump you should have checked for voltage at the back powering up the pump. No voltage = problem forward inthe schematic of things. Replies to this message: diesmart (Sep 26, 2006 6:57 am) imidazol97 (Sep 26, 2006 7:26 am) diesmart (Sep 26, 2006 4:05 pm) and 1 more...
#3753 of 3823 Re: 2002 malibu fuel issue [diesmart] by 3745 Sep 26, 2006 (5:45 am)
Replying to: diesmart (Sep 25, 2006 12:11 pm) I've just checked a typical GM fuel pump circuit. A set of contacts on the oil pressure switch bypasses the fuel pump relay when the engine is running and oil pressure is correct. This 12v is fed directly to the pump motor. On the circuit I have the 12v for the oil pressure switch is fed off the 20amp fuel pump injector fuse. Bear in mind this might be different on your car but the information could help you. With ignition on, there should be 12v on point "C" of the oil pressure switch. With oil pressure the contacts close and point "D" of the oil pressure switch feeds 12v to the fuel pump.   If your oil pressure switch seems the same, shorting out terminals C and D with ignition on should get the fuel pump running. This test will prove if the pump and wiring is ok and point to the pressure switch being defective.

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