Question about 1995 Pontiac Grand Am

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94 5.7 falles on face boggs down then clesars up a little runs nlike junk. good cap and rotor plugs wires and new fuel pressurs regulator filter what am i missing ?????????????????? HELP

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  • Pontiac Master
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Incorrect timing? Weak spark (coil)? Low fuel pressure (restricted filter, fuel pump)? Incorrect spark plugs ? Low compression? Worn out camshaft (insufficient lift)? Spark advance (ignition module)? ECM?

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

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SOURCE: 1989 pontiac gta won't start when hot and runs bad after warm

i melted my module off of mine 89 gta once on my disturbertor and also had the plugs that snaps onto the coil pack cause a lot of problemns because it wasn't snapped all the way don on the coil pack not the plug wires but the wiring harness plugs and it gave mne a lot of problems.may want to check yourself took it to a dealer ship 4 weeks in a row and every time they said it was fixed i drove it for a couple hours and it would quit and not start and that was all it was but it started with a tune up wires, cap ,rotor button.

Posted on Sep 21, 2009

  • 14585 Answers

SOURCE: 2004 pontiac grand am replaced O2 sensor, spark

Idle air control motor(IAC). EGR valve. And vacuum leaks to include the brake booster and if you have a plastic intake, that too. this is a start there are other things that will have the same symptoms. let me know
Randy

Posted on Nov 12, 2010

Zim1308
  • 543 Answers

SOURCE: I have a 1992 Pontiac

do a vacuum test on the FPR if it IS holding vacuum, then i would try to test the fuel pump.

Posted on Apr 18, 2011

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If the fuel pump(s) run while the pressure is falling, replace the fuel pressure regulator and (although I'm sure you've already done this), replace the fuel filter. If the fuel pumps appear to be turning off by themselves, replace the inertia (fuel cutoff) switch.

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signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!

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Hi,
I think you are on the right track. With the engine off remove the vacuum hose from the fuel pressure regulator and see if there is fuel in the vacuum hose or fuel is leaking from the fuel pressure regulator vacuum nipple,if so replace the regulator,check to make sure that the engine oil is not contaminated by fuel if so,change the oil and filter. Good Luck!

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Check the fuel pressure regulator and the EGR valve, I would check the fuel pressure regulator first and go from there. Good luck and keep me posted. Not sure what the pressure should be but thinking it's 62 to 65 PSI upon start up and should drop 5 PSI when engine running, check the vacuum line to the regulator.

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Fuel ,fire,new cap &rotor,wire firin noted ok. still no start.


did you put REAL HONDA parts or aftermarket parts.....i bet you put aftermarket parts in it...Hondas and Toyotas are very sensitive about ignition parts...ONLY get the real deal....NO aftermarket junk. i did the same mistake with my 89 honda accord. never again...

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