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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

runs rough when in gear

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Old Sep 13, 2004 | 05:13 PM
  #1  
dad2mba's Avatar
dad2mba
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runs rough when in gear

hey fellow truckers,i have a 86 f 150 with a 302 ,the truck idles fine when in park are in nuetral,but when you put it in gear the truck idles rough and will not pull,any help would be appreciated ,thanks
 
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Old Sep 13, 2004 | 06:10 PM
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big hoss 29
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From: Billings Montana
I'm assuming you have EFI, so it sounds like your Throttle Position Sensor. If it's out of whack, it will affect idle quality, and tranny operation. Check for any codes to confirm this.
 
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Old Sep 14, 2004 | 07:08 AM
  #3  
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dad2mba
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ths.

Thanks, big hoss 29 for the info,i will have a buddy of mine chk the codes and the position on the sensor ,i did replace it earlier.
 
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Old Sep 14, 2004 | 09:08 AM
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db_tanker
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Might also want to check the throttle body. Might be gummed up inside the bores.

Also the ISC valve might be going bad.

DB
 
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Old Sep 14, 2004 | 12:48 PM
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lmadore
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From: Mid-Missouri
EGR valve or position Sensor could also be the culprit.
Surging idle when in neutral is a good indicator sometimes.
Clean the valve and make sure there are no vaccum leaks to the valve.
 
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Old Sep 14, 2004 | 10:47 PM
  #6  
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Big ole Dog
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Is the Timing right what about a disttribuer hold down clamp is that tight or if it is can you move the dist. ?
 
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