I Am Stumped

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Feb 29, 2004 | 07:33 PM

bronco 1996 16 year old

Thread Starter

Junior User

Joined: Nov 2002

Posts: 66

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From: Minnesota

I Am Stumped

i got this 87 bII and it runs and drives great... until it warms up. Once the temp climbs up to the normal zone it runs on like 4 cylinders and backfires and thumps. I cleaned the fuel rail, i replaced the injectors, i checked the coil, distrib, and the plugs and i cannot find the problem! Will someone please help me!!!
THANK YOU

Feb 29, 2004 | 07:50 PM

Ken00

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Joined: Dec 2001

Posts: 10,562

Likes: 4

From: South Jersey

The first thing to do is pull the codes, you have a problem once it goes into closed loop which indicates a sensor problem. See the tech info post for more info on pulling the eec-iv codes.

Feb 29, 2004 | 08:54 PM

bronco 1996 16 year old

Thread Starter

Junior User

Joined: Nov 2002

Posts: 66

Likes: 0

From: Minnesota

Thank you!!!!!!!!!!!!!!!!! i know how pull codes and i have a scanner!

Mar 1, 2004 | 06:09 PM

danbov

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Joined: Feb 2004

Posts: 7

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From: Massachusetts

You might want to see if the fuel filter located on the frame underneath the drivers door has been changed . My 87 ran fine the first few minutes , then as I approached highway speed those symptoms would appear. I changed the filter out and no problems.

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