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Hot motor head


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timrock
New User

Mar 14, 2013, 12:37 PM

Post #1 of 4 (823 views)
post icon Hot motor head Sign In

Mad '95 Buick century-After driving(engine running) for 45 mins to an hour.The engine will not start.Wait about 20 mins & it will start again. Any anwsers?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 14, 2013, 1:17 PM

Post #2 of 4 (791 views)
Re: Hot motor head Sign In

What does it do?

Does it crank?



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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.



timrock
New User

Mar 14, 2013, 2:00 PM

Post #3 of 4 (784 views)
Re: Hot motor head Sign In

yes -the engine turns over & over ,but won't start. Wait a while it seems to cool off & then will start.Don't have a problem til i shut off the car & try to restart. Ignition module?


(This post was edited by timrock on Mar 14, 2013, 2:02 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 14, 2013, 4:05 PM

Post #4 of 4 (760 views)
Re: Hot motor head Sign In

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.


Once you have determined which of these functions has dropped out,
you will know which system is having the problem.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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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