1995 351 missing when warm

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Nov 4, 2012 | 04:51 PM

andyj ford driver

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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

Nov 5, 2012 | 07:37 AM

rla2005

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From: Kentucky

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.

Nov 5, 2012 | 11:33 AM

andyj ford driver

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im sorry it showed code 111 for system pass that is all it showed

Nov 5, 2012 | 11:44 AM

rla2005

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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.

Nov 5, 2012 | 11:56 AM

andyj ford driver

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they have all been changed in the last 20000 miles

Nov 5, 2012 | 12:52 PM

rla2005

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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.

Nov 5, 2012 | 06:34 PM

andyj ford driver

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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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Nov 5, 2012 | 09:17 PM

andyj ford driver

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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