2000 Pontiac Grand Am Won't stay running

Tiny
CHAPJEFFREY
  • MEMBER
  • 2000 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 115,000 MILES
I have a 2000 Pontiac grand am gt. It will start first time of the day and run until it gets warm about 200 degrees (1/2 way on the gauge) then it stops taking fuel when you push the throttle. It chugs then dies. Once it dies it will not stet again until it gets cooled down. All the lights would come on on the dash.

I put. New ECM, new fuel pump, new wheel sensor and new plugs and wires. Now no lights come on and it won't run. We put a computer on it and it shows no codes. It won't rev over like 2600 rpm.

Please help I'm running out of money.
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Tuesday, August 17th, 2010 AT 8:17 PM

2 Replies

Tiny
WRENCHTECH
  • EXPERT
All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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Tuesday, August 17th, 2010 AT 8:21 PM
Tiny
TOOOMANYTOYS
  • MEMBER
Have you checked the catalyic convertor. Alot of times if the catalist inside begins to clog, and the engine can not (exhaust) the combusted gases causing a back up and loss of power when accelerating once warm.
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Tuesday, August 17th, 2010 AT 8:32 PM

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