302 missing
Posting Guru
Joined: Jun 2004
Posts: 1,781
Likes: 1
From: Central NY
Does it do this in gear only (ie : while driving) or in park too?
In gear only would like be a bad speedo.
Have you pulled any codes yet? a 96 would be odbII and most parts store will pull them for free.
Cheers,
Popa Tim
In gear only would like be a bad speedo.
Have you pulled any codes yet? a 96 would be odbII and most parts store will pull them for free.
Cheers,
Popa Tim
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
A clogged cat would be more noticeable under a load rather than in neutral. Sounds like the EGR is the problem, especially since there is a code for the EGR system. The EGR valve is likely opening more than the computer thinks, so it throws the insufficient flow (valve not sensed opening enough) and tries to open it more, causing the truck to run rough. Diagnose the EGR system and you should find the problem.
Posting Guru
Joined: Jun 2004
Posts: 1,781
Likes: 1
From: Central NY
If its only doing it while driving then you may have a bad speedometer.
They can develope bad spots which and not send the speed info to the computer thusly the computer has no idea how to run the engine. Speed up a bit and its fine again.
Good Luck,
Popa Tim
They can develope bad spots which and not send the speed info to the computer thusly the computer has no idea how to run the engine. Speed up a bit and its fine again.
Good Luck,
Popa Tim
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Senior User
Joined: Jun 2003
Posts: 340
Likes: 0
From: Livonia
it also does it while not in gear....it is worse while stopped than driving. also i dont think it is the speedometer because it does it according to rom in every gear at any speed
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Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
It's likely an electrical sensor problem, not an actual dirty EGR valve. Most likely culprit is the position sensor or the DPFE sensor, not sure which one you have. Diagnose the EGR system (electrical tests, etc) and you should find and take care of the problem.
