Thread: Removing/Disabling the Cat Diagnostic Test....

So I'm having the really rich LTFT issue on my 01 Monte SS. I've got a 3" DP with high flow cat. Can anyone disable the cat test in my bin file if I send it? I have a powrtuner, but it won't do the job.

i Have an 00 bin file since there really isn't an 01 MC SS bin file. The car came with a 00 MC SS bin. I just flashed the car with the stock bin file earlier. I'll go out and see if the pig rich condition comes back. If it does, I'll start looking at fueling problems. I replaced the plugs a couple hundred miles ago. They all looked fine. No sign of one of the cylinders being richer than another. I wonder if it's possible for a 2000 bin file to have the cat test.

Originally Posted by Lawngoose

From everything I have read its only in 01+ models.

Have you changed anything with the exhaust or engine? Mine pegged out like that when i had an exhaust leak. If your exhaust is fine, you might have a vac leak.

I'll look into it. I've got a SS ceramic coated Plog, ported rear mani, and a 3" R/T downpipe. Everything was on the car when I got it except for the Plog, which I installed myself. I'll make sure everything is tight and get back to you.

I did flash a 2000 bin file to the car and I did a scan earlier and didn't notice LTFTs going rich.