service engine light comes on

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Oct 5, 2009 | 09:58 PM

dwhite815

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service engine light comes on

I am unable to relocate the thread thast explains how to test the 9 pin connectors on the valve covers. My service engine soon light comes on in a pull,but goes off soon and the truck runs fine. Anything I need to worry about untill it gets worse? I hate to pull the valve covers yet as this engine does not leak anywhere with 90,000 miles on it. 1999 ford 350 a/t 4x4 all stock my fist diesel. Thanks Denny Belen,NM 87002

Oct 5, 2009 | 10:33 PM

Meeks

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What the reasoning for testing the connector? Just wondering cause my truck does the check engine light thing when i'm pulling

Oct 5, 2009 | 10:52 PM

rbaker6336

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From: Blairsville,Ga

if you have a chip or programmer it could be insuficiant high pressure oil which is normal,but you would have to check the codes to be sure.My truck does the same in a long hard pull

Oct 5, 2009 | 11:03 PM

Meeks

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thanks, I do have a programmer on mine.

Oct 6, 2009 | 03:41 AM

Visseroth

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From: Northern Idaho

My SES light comes on when I'm pulling a heavy load or accelerating to fast down the hwy. The only thing I can figure is that it's the HPOP that's having a hard time keeping up with my demands and since I have a E99 with a 15* HPOP that would make a ton of sense and when I let off the throttle and set my cruising speed the SES light shuts off again.