S197 Newbie with a "new-to-me" 2005 GT (5-speed) question.
The 2005 is recently purchased, low mileage, with complete service documentation from the original owner. The upgrades are very mild - consisting of an Air Raid cold air intake, Hurst shifter, and a Bama 91-octane performance tune in place, and the included Bama tuner. (appears to be similar, but not an exact cosmetic match to the Bama SF3/X3 tuner)
The car, as is, starts easily, idles smoothly, but will occasionally pop P0420/P0430 errors regarding the catalyst system efficiency on each bank. The car seems to run without issue with those errors, and if cleared, they will not reappear for a week or more.
I wanted to baseline the car to get a better idea of what I was dealing with, and so connected the tuner and selected the "return to stock" option. Once completed, the car idled very slowly and unevenly, had an uneven knocking sound under the hood which I couldn't locate by sound, and seemed to be pushing a lot of fuel through the system making the exhaust pretty thick, and would briefly idle up to normal only to drop down and then die.
Returning the car to the 91-octane performance tune, it started perfectly, idles smoothly, and runs without issue. I repeated the stock attempt and return to 91 octane several more times with the same result.
Is there a way to return the car to stock, unmarry the Bama tuner, and get the car to a usable state? It sounds so sickly when idling in the non-tuned state that I hesitated to let it run or start it to get it running for more than 10 minutes. Should I return to stock, reset the PCM, and hope for the best?
Thanks for sticking with me.
PB
The 2005 is recently purchased, low mileage, with complete service documentation from the original owner. The upgrades are very mild - consisting of an Air Raid cold air intake, Hurst shifter, and a Bama 91-octane performance tune in place, and the included Bama tuner. (appears to be similar, but not an exact cosmetic match to the Bama SF3/X3 tuner)
The car, as is, starts easily, idles smoothly, but will occasionally pop P0420/P0430 errors regarding the catalyst system efficiency on each bank. The car seems to run without issue with those errors, and if cleared, they will not reappear for a week or more.
I wanted to baseline the car to get a better idea of what I was dealing with, and so connected the tuner and selected the "return to stock" option. Once completed, the car idled very slowly and unevenly, had an uneven knocking sound under the hood which I couldn't locate by sound, and seemed to be pushing a lot of fuel through the system making the exhaust pretty thick, and would briefly idle up to normal only to drop down and then die.
Returning the car to the 91-octane performance tune, it started perfectly, idles smoothly, and runs without issue. I repeated the stock attempt and return to 91 octane several more times with the same result.
Is there a way to return the car to stock, unmarry the Bama tuner, and get the car to a usable state? It sounds so sickly when idling in the non-tuned state that I hesitated to let it run or start it to get it running for more than 10 minutes. Should I return to stock, reset the PCM, and hope for the best?
Thanks for sticking with me.
PB