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car runs for about 20 min then dies won't restart until engine cools
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elmer burks
New User
Sep 10, 2009, 9:06 AM
Post #1 of 3
(3684 views)
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car runs for about 20 min then dies won't restart until engine cools
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92 oldsmobile cutlass supreme sl 3.1 152k strong engine replaced every sensor i can find also fuelpump,coils,control module, thermostat [tested myself] plugs and wires and many other parts the will start right up and run or drive without any trouble for about 20 minutes the temp will start to go up past 195deg [thermostat rating] the car suddenly die no jerking no hesitation no warning then you coast to a stop it will not start again until it cools off this is my present transportation any advice would be much appreciated.
radiators good i'm going to try a compression check anyone know anything about the symptoms of cracked valves? Thank you very much for your help and comments.
(This post was edited by elmer burks on Sep 11, 2009, 7:33 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 10, 2009, 9:29 AM
Post #2 of 3
(3678 views)
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Re: car runs for about 20 min then dies won't restart until engine cools
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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 test 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.
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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Loren Champlain Sr
Veteran
/ Moderator
Sep 10, 2009, 11:03 AM
Post #3 of 3
(3672 views)
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Re: car runs for about 20 min then dies won't restart until engine cools
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elmer; You should have installed a 195F thermostat, right? That is the minimum temp the engine will run at, once warm. It is very common to see 210-230F, as it is designed to run at. The cooling fans generally won't come on until it reaches around 230-235F. As for the dying and having to cool before restart, follow Hammer's advice.
Loren
SW Washington
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