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Runs good until warms up

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Old Aug 6, 2010 | 10:50 PM
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MNbandit's Avatar
MNbandit
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Runs good until warms up
My truck recently has been running weird. When I first start my truck when it's completly cool it runs fine. After about five minutes it starts to run rough and buck. It does idle high at first when I start it. Could this be the coolant temp sensor? The iac and tps are new.
 
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Old Aug 6, 2010 | 11:24 PM
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f-150_1993
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From: TX
Well when my ECT sensor was bad it made my truck
have trouble starting after warmed up.

I don't know about making it run rough when warm though.
Maybe the Air Temp Sensor.
 
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Old Aug 7, 2010 | 09:16 AM
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Pull the codes so you know if there is a sensor problem or not, don't just blindly guess.
 
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