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1992 Pontiac Grand Prix Will Not Start

Tiny
RONKAY
  • MEMBER
  • 1992 PONTIAC GRAND PRIX
Engine Mechanical problem/electrical
1992 Pontiac Grand Prix 3.4l 6 cyl Front Wheel Drive Automatic 134K miles

I have a 3.4L 1992 Pont that will not start. Was runing great then just would not start? Have checked for fuel and it appears to be OK. However, no spark when tested? Checked for trouble codes and there are none? Checked all fuses and they all look and test good.

What should I check?

Thanks for the help.

Ron
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Monday, February 25th, 2008 AT 3:50 PM

10 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
For starters, have you had the PCM (computer) scanned for codes? Autozone will do it for free. If the PCM sees a problem it will store a code that will help in diagnosing the problem.
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Monday, February 25th, 2008 AT 3:52 PM
Tiny
RONKAY
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I checke and ther are no trouble codes being displayed?
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Monday, February 25th, 2008 AT 3:54 PM
Tiny
MASTERTECHTIM
  • MECHANIC
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These engines are notorious for breaking timing belts so I would check that or check compression. If ok then it is usually crank sensor or ignition module. Without special tools to diagnose, I would replace crank sensor first(its only about $20 and is easy to do) then go after ignition module. Crank sensor is most common.
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Monday, February 25th, 2008 AT 3:54 PM
Tiny
RONKAY
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  • 7 POSTS
Timing belt appears to be OK. Is there any way to check to crank sensor other then replacing it? Same question about ignition module? Regarding the ignition module, are you talkiing abut the ECM? This car has three individual ignition modules.

Ron
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Monday, February 25th, 2008 AT 4:02 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Yes. To test the crank sensor you need a ohm meter across the 2 terminals of it and check for resistance, if open then its no good. Also put meter on ac volt and go across the 2 terminals of crank sensor, crank engine and watch for voltage, if none replace the sensor. The ignition module im talking about is under the ignition coils.
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Monday, February 25th, 2008 AT 4:42 PM
Tiny
RONKAY
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Tried sending/giving you feedback/points but could not? Not sure why? Seems I only have.1 points. That may be the reason. In any event, thanks very much for your help.

A couple of questions. I'll follow up on your instructions and try testing the sensor. However, I do have a really dumb question, where the heck is the sensor located? I looked in my manual, but they don't give an exact location?Hmmmmm! Also, I noticed when I crank the eng. The tac. Goes negative, at least it goes in the CCW direction. Is this perhaps an indicator as to the condition of the sensor?

Thanks again,
Ron
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Monday, February 25th, 2008 AT 5:43 PM
Tiny
RONKAY
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  • 7 POSTS
Great News! It's fixed.

The problem was with the ignition module! I replaced it and all is well, at least for a while.

Thanks for all your assistance.
Ron
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Thursday, March 13th, 2008 AT 12:51 PM
Tiny
RONKAY
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Tried sending/giving you feedback/points but could not? Not sure why? Seems I only have.1 points. That may be the reason. In any event, thanks very much for your help.

A couple of questions. I'll follow up on your instructions and try testing the sensor. However, I do have a really dumb question, where the heck is the sensor located? I looked in my manual, but they don't give an exact location?Hmmmmm! Also, I noticed when I crank the eng. The tac. Goes negative, at least it goes in the CCW direction. Is this perhaps an indicator as to the condition of the sensor?

Thanks again,
Ron[/quote:bdf7d149ee]

I located the crank senson on the middle back side of the block. Very difficult to access. Actuallly I found the ignition module was bad and not the sensor. Although it was a bit more expensive then the sensor, I was able to replace it without an issues. I think the sensor would have been a real problem getting too it for replacment.

Thanks for your help.

Ron
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Thursday, March 13th, 2008 AT 1:01 PM
Tiny
MASTERTECHTIM
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Awesome.
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Thursday, March 13th, 2008 AT 4:59 PM
Tiny
FRED TROMBLY
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Dosenot have three exn modd only 1 but three coils
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Saturday, January 10th, 2009 AT 11:32 PM

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