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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

erratic idling

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Old Nov 26, 2007 | 09:53 AM
  #1  
amcv8jeep's Avatar
amcv8jeep
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erratic idling

i have an '88 f-150 with a 300 I-6. fequently when driving, it will hold idle at whatever rpm i am running. like on the interstate running 2500 rpm, i will get off an exit and it stays at 2500rpm, but it has no power when this happens. you cant let the clutch out or it will stall. the throttle body is clean. I replaced the IAC motor and checked the vacuum lines. but since it doesn't do it every time, I am really at a loss. any ideas would be helpful.
 
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Old Nov 26, 2007 | 04:41 PM
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Straight Six
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Sounds similar to what mine was doing. I just replaced my throttle positioning sensor, try that first. Let me know how u make out.
 
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Old Nov 27, 2007 | 07:44 AM
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amcv8jeep
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i will. i am also going to replace the intake aircharge temperature sensor. until last night, i was unaware that one was used with eec-IV
 
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