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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

Idle issue

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Old Feb 18, 2014 | 04:47 PM
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Natcox012
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Idle issue

88 f250 460 c6 seems to cut out after starting and shift into reverse or a drive gear not neutral, I know I Boggs Down a bit but this almost kills it any ideas? New fuel pumps, sending units, tank, tune up,
 
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Old Feb 20, 2014 | 05:58 AM
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From: Easton,Ks
You need to check all three sets of codes and post back what phase each code was read under (KOEO, CM or KOER).

I do not know if you are saying you replaced "New fuel pumps, sending units, tank, tune up,"or if you are asking if you need to replace them.

The item most likely to cause this would be the TPS but most of the time it will not give a code unless you have an open wire going to it.
 
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Old Feb 20, 2014 | 06:17 AM
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I just had this problem with my 93 F250 5.8. I cleaned out my throttle body as it was filthy and I was low on tranny fluid so I filled it up and that solved my problem for the most part. I also need an alternator as once I put it in drive or reverse, my voltage drops noticeably and wants to die out. Try cleaning your throttle body and IAC and check your tranny fluid level.
 
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Old Feb 20, 2014 | 11:29 AM
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Yea that's something to.. I had an older motor craft alternator on the truck and thought it was going out... So replaced with another 75 amp from oriellyautoparts but it originally had a 100 amp belt on it, which would fit the new alternator, so got a smaller.. Belt would that cause anything and yes the shop replaced all them parts..
 
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Old Feb 20, 2014 | 11:34 AM
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So ill check throttle body and low tranny fluid but I doubt cause I haven't had a leak..
 
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Old Feb 20, 2014 | 02:25 PM
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Yeah definitely check your fluid level, if it's low the converter will lock up and kill the engine.
 
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