SCT Tuner Question

I purchased an SCT Tuner from 5 Star and have been pleased with it. I put the stock tune back on for a dealer visit, and I think they flashed the PCM.

Without thinking, I put the performance tune back on... Do you think the tuner copied the NEW stock program before replacing it?

Thanks,
Toby

why do you think they flashed the PCM?

jutrast said:

I purchased an SCT Tuner from 5 Star and have been pleased with it. I put the stock tune back on for a dealer visit, and I think they flashed the PCM.

Without thinking, I put the performance tune back on... Do you think the tuner copied the NEW stock program before replacing it?

Thanks,
Toby

Click to expand...

Sure... Tuners download the stock calibration into it. The tuner adds the changes to the stock calibration and uploads it back into the vehicle and stores the stock calibration. Reason you cant tune more than one vehicle with it... If your truck runs with the new tune its all good. Only thing you might have wanted to do was drive the new dealer flash for a few weeks... If it were me I would go back to stock and drive it foe w while then reflash...

Yeah, it will copy the stock tune each time you re-tune it.

If you go from say 89 performance to 93 performance, it will not re-copy the stock tune since it's still in the device memory.

If you go from 89 performance to stock and then from stock to 89 or 93 or whatever, it will re-copy the stock tune from within the truck.

They re-flashed the PCM when troubleshooting a transmission issue that kept putting the truck into limp mode... Turns out it was a broken connector on the wiring harness that intermittently lost communication with the PCM.