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wellsey006
New User
Dec 12, 2009, 11:29 AM
Post #1 of 5
(2508 views)
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99 grand prix gtp stalls
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99 grand prix gtp 3.8 sc,car will start and run when cold as soon as it get to operating temp it stalls and will not start again till it cools down,have done the fuel pump resistor bypass test with no results,no codes are showing up to read ,did a fuel pump pressure test and checks out normal,anyone have any idea?Thanks
(This post was edited by wellsey006 on Dec 13, 2009, 12:58 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 12, 2009, 12:43 PM
Post #2 of 5
(2503 views)
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Re: 99 grand prix gtp stalls
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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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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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gmcnabb
New User
Aug 9, 2010, 12:39 PM
Post #3 of 5
(2415 views)
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Re: 99 grand prix gtp stalls
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Maybe the Idle Air Control valve is malfuntioning.
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re-tired
Veteran
/ Moderator
Aug 9, 2010, 12:49 PM
Post #4 of 5
(2412 views)
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Re: 99 grand prix gtp stalls
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The maybe game can get expensive quick. Maybe this maybe that. Do as HT has recommended . A set by step peocess of elimination.
LIFE'S SHORT GO FISH
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