03 PT GT Turbo ATX going full rich after wot pull

[SPLNeon]

My pt gt will run pig rich after a 1/4 mile pass until I stop, and put the vehicle in park. Is this common practice with the diablotune? I have a friend with the neon srt4 that just started experiencing the same thing. I'm just worried about cylinder wash.

[mikel]

thats not something I am familiar with unless it is going into COT and dumping fuel to cool the cats.

[SPLNeon]

thats not something I am familiar with unless it is going into COT and dumping fuel to cool the cats.

I was thinking the same thing, but my downstream o2 isn't even in the pipe. It's tie strapped under the car lol. Had to use that bung for the Wideband. My buddy's srt4 has his downstream o2 in place. Maybe his is giving false readings?! And maybe mine is playing safe mode with it not in the pipe?! Any way to turn off the downstream o2 sensor this eliminating COT conditions?!

[mikel]

do you have a Cat?
If not you should get a custom tune with COT disabled, if so, disabling it will eventually lead to a melted cat.

[SPLNeon]

do you have a Cat?
If not you should get a custom tune with COT disabled, if so, disabling it will eventually lead to a melted cat.

No cat, it's just an open downpipe. Track only car

[mikel]

Yeah, you should look into a custom tune to optimize that setup.

[SPLNeon]

Yeah, you should look into a custom tune to optimize that setup.

Fwiw, I swapped to a Mopar stg 1 pcm, then flashed the intune diablotune onto it, and no more Cat over temp conditions.