Stalling when warm

Tiny
CCOGIS
  • MEMBER
  • FORD F-150
To whom this may concern,

My name is Chris and I own a 2000 Ford F-150 with the 4.6 Triton in it. Recently I have been having a really big problem with the truck. The truck runs fine when cold, but after driving for a while. Usually more than a half an hour I have a problem starting it after I turn it off, usually when it is warm and has been turned of for more than 5 minutes. When I try to start it it stalls right away.I noticed that if I keep my foot on the gas and have the rpm up(around 2000rpm) for a couple of minutes, it will idle ok and everythings fine. But it has been getting worse ! Now the problem doesn't go away unless the engine cools and if I try to drive it I have to drive it with 2 feet to keep the rpm up at a red light. It runs fine if I continue to move but when I pull up to a red light it stalls.I thought it might be the air charge temp. Sensor, but that didn't fix it. It's obvoiusly a problem only when its warm. Do you have any clue why this might be happeneing? Sorry for the long question, but I wanted to explain it as best as I could. Thank you for your time ! Mr Cogis
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Wednesday, August 22nd, 2007 AT 11:48 PM

7 Replies

Tiny
INDYUKE
  • MEMBER
A lot of fords have this problem.

You are right to suspect temperature sensitive components first. The air charge temp sensor is used to help determine fuel trim, however the coolant temp sensor is what the PCM uses to "know" the engine temperature. Not sure if that's your problem, but coolant temp sensor often goes bad.
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Thursday, August 23rd, 2007 AT 1:57 AM
Tiny
CCOGIS
  • MEMBER
If thats the case wouldn't my temp guage read an overtemp situation. It reads normal !
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Thursday, August 23rd, 2007 AT 3:41 AM
Tiny
INDYUKE
  • MEMBER
You have two temp guages. One serves the PCM, and the other serves the guage. You want to check the one that serves the PCM.
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Friday, August 24th, 2007 AT 12:59 AM
Tiny
CCOGIS
  • MEMBER
Is that the sensor directly next to the thermostat? I coudn't get a wrench in there to take it out.(Butted right up against the intake manifold. If not whould you happen to know where it is?
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Friday, August 24th, 2007 AT 3:57 PM
Tiny
INDYUKE
  • MEMBER
Yes, I believe that's where it's at. You may have to remove some sorrounding components.
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Saturday, August 25th, 2007 AT 2:00 AM
Tiny
CCOGIS
  • MEMBER
I think I found the problem. The other day I changed the Idle air control valve and it seems to be running ok as of today ! I'll keep you posted if anything changes !
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Wednesday, August 29th, 2007 AT 10:33 PM
Tiny
INDYUKE
  • MEMBER
Awesome!
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Friday, August 31st, 2007 AT 1:55 AM

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