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1990 Ford F150 stalls after it gets warm, won't start until it cools down


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Clifford
New User

Dec 30, 2010, 4:33 PM

Post #1 of 4 (3855 views)
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1990 Ford F150 stalls after it gets warm, won't start until it cools down Sign In

My F150, 5.0, starts fine and runs well, once it warms up it shuts off and won't start again until it cools down. I appreciate your advice and suggestions.


Hammer Time
Ultimate Carjunky / Moderator


Dec 30, 2010, 7:29 PM

Post #2 of 4 (3848 views)
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Re: 1990 Ford F150 stalls after it gets warm, won't start until it cools down [In reply to] 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.




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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.



Gerty
Novice

Jan 1, 2011, 10:22 AM

Post #3 of 4 (3840 views)
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Re: 1990 Ford F150 stalls after it gets warm, won't start until it cools down [In reply to] Sign In

Hi, what are the conditions when you try to restart? No crank, just a click etc? Hammer Time is correct in following his logical flow chart in attempting to pinpoint a problem area. With that said I had an late 80's ford that had a similar problem. It turned out to be a bad starter motor. Once heated up it would not crank- only click at the solenoid until after the starter motor cooled a bit.


Jeff Norfolk
Enthusiast / Moderator


Jan 1, 2011, 10:38 AM

Post #4 of 4 (3838 views)
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Re: 1990 Ford F150 stalls after it gets warm, won't start until it cools down [In reply to] Sign In

This one shuts off after warm. Not a starter motor causing that.

Jeff




1990 Ford F150 stalls after it gets warm, won't start until it cools down


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