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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 08-06-2010, 11:50 PM
MNbandit MNbandit is offline
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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 08-07-2010, 12:24 AM
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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 08-07-2010, 10:16 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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Old 08-07-2010, 10:16 AM
 
 
 
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