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  #1  
Old 02-12-2013 | 05:11 PM
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Default Rpm
when the truck thinks about starting. the rpms keep bouncing 400 to 600 for a good 10 min befog the truck idles up to were it can be driven.
 
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  #2  
Old 02-12-2013 | 05:20 PM
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IAC? Idle Air Control?
 
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Old 02-12-2013 | 05:25 PM
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Ive replace that way to many times. that has to be good
 
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Old 02-12-2013 | 06:20 PM
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Vacuum leak probably.

Where at in adrian?
 
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Old 02-12-2013 | 07:00 PM
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surging idle is usually caused by a bad throttle position sensor TPS. (not IAC). drivers side of throttle body. about $40-50 at any parts store.
 
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  #6  
Old 02-12-2013 | 07:08 PM
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Originally Posted by dhvaughan
surging idle is usually caused by a bad throttle position sensor TPS. (not IAC). drivers side of throttle body. about $40-50 at any parts store.
Damnit!
 
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Old 02-12-2013 | 07:24 PM
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the only reason i know is that i used to have that condition but only in a cold start in cold weather. i changed the damn iac about 3 or 4 times before it dawned on me to try the tps.
 
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Old 02-12-2013 | 09:04 PM
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Yep. Both have to be good for a good ilde.
 
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