383 tpi running rich: continued... - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

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post #1 of 2 (permalink) Old Oct 7th, 01, 04:28 AM Thread Starter
Tech Team
Join Date: Aug 2001
Location: Lafayette, TN, USA
Posts: 34

I started a new topic so those who were interested would not have to read a novel to get caught up.

In summary, the problem basically is a 383 tpi smoking badly with no error codes. We have entertained several theories from faulty head gaskets to computer problems. While not all theories proved to be the answer, they all were sound theories and helped me close in on the problem.

My latest discovery, and hopefully the jackpot, is that I have a bad fuel injector. While I could feel it pulsing when the car was running, the cylinder still would not fire. After swapping the injectors, I found that whatever cylinder I put that injector on would NOT fire. Thus, I have a bad injector.

This, in turn, was pushing air only out of that cylinder, fooling the O2 sensor into thinking the car was running lean. The computer tried to add fuel to correct, and created a rich condition that it could not see.

That is the theory that I am working off of, anyway. I hope this makes sense to you guys, and I would appreciate your input.

You guys have done a great job with this situation, and I hope you continue to give input as I try to fix this thing once and for all.
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post #2 of 2 (permalink) Old Oct 7th, 01, 05:53 AM
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Join Date: Apr 1999
Location: Fortuna, CA
Posts: 26,461

It's really better for site maintance to keep it in a single thread. When the time comes to clean up this forum you may loose half your info...
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