1994 Pontiac Grand Prix won't start

WINGNUT1991

MEMBER
1994 PONTIAC GRAND PRIX

Engine Mechanical problem
1994 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

94 pontiac grand prix 3.4 won't start, have had lots of issues with this thing its a love hate relationship. Well I've replaced the fuel pump at a locale shop because it would'nt start and or ran rough, some what fixed the issue excepted it ran so rich I could'nt drive it, it smelled like a traveling gas station and miss firing, never mind the gas gage jumping around. So I replaced the injectors, and the fuel pressure regulator. Car ran great for about an hour, no issues at all. Then I reved the engine and it stalled and now it won't start, I thought it might be out of gas, so put in a couple gallons and nothing, it does'nt sound like its firing at all. Please Help

3 Replies

MMPRINCE4000

MECHANIC
8,548 POSTS

Start by checking fuel pressure with mechanical gauge, if OK, then check spark with spark tester, look for blue snapping spark.

If no spark (anything other than blue is considered no spark), then remove ign. module and have it tested at most autoparts stores for free, other possibilities are crank sensor, MAP/MAF, coolant temp sensor.

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Sunday, March 29th, 2009 AT 7:26 AM

WINGNUT1991

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2 POSTS

Well it turned out not to be the ignition module or the crank shaft sensor. After spending hundreds of dollars on this and that, it turned out to be $43.00 timing belt and $33.00 timing belt idler. Both parts were completely torn apart. I wish I had check this months ago it would have saved me tons of money. But I thank you for your help and if anyone has the same same issues, check your timing belt, a loss of a tooth can make your life hell when it comes to these 3.4 v6's And yes re-timing this engine can be done with out tearing the whole thing apart and spending an arm and leg for tools you really don't need, as long as the factory timing marks are still there. If the factory marks aren't there then you'll have to do it by the book and that my friend is a pain in the ***.

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Tuesday, July 28th, 2009 AT 9:23 AM

MMPRINCE4000