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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

1995 351 missing when warm

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Old Nov 4, 2012 | 04:51 PM
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1995 351 missing when warm

i have a 1995 f150 with a 351 and it misses when it gets to operating temp and it shakes at about 40-45 mph i went to oreilys and read the codes and it didnt show any, where should i go from there.
Thanks
 
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Old Nov 5, 2012 | 07:37 AM
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Clean the contacts on the data link connector. If the reader actually connected to the PCM you should have gotten the all clear code of 111/111 for KOEO tests and 111/111 for the Continuous Memory display if the tests passed and no codes stored in memory.

Anything less means your test is invalid.
 
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Old Nov 5, 2012 | 11:33 AM
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im sorry it showed code 111 for system pass that is all it showed
 
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Old Nov 5, 2012 | 11:44 AM
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Thanks for the clarification.

Next set of questions: How old are the plugs/wires/cap/rotor and filters? Never ignore the basics.
 
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Old Nov 5, 2012 | 11:56 AM
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they have all been changed in the last 20000 miles
 
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Old Nov 5, 2012 | 12:52 PM
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20k and how old?

I would pull the plugs to see if any of them show signs of oil/rich condition. If the plug wires/cap/rotor were cheapos from Advance or AutoZone, etc. they could already be trashed. A visual inspection will tell you a lot.
 
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Old Nov 5, 2012 | 06:34 PM
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they are a year old and they are autolite plugs and wires form napa. would a plug that is not gapped right cause it to miss
 
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Old Nov 5, 2012 | 07:57 PM
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Originally Posted by andyj ford driver
they are a year old and they are autolite plugs and wires form napa. would a plug that is not gapped right cause it to miss
It sure could.

What about the cap and rotor? age/miles/brand/did you inspect them...
 
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Old Nov 5, 2012 | 09:17 PM
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they are whatever brand it is that napa sells i havent had a chance to pull the plugs yet i will try to do that tommorow
cap and rotor were changed at the same time as the plugs and wires
 
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