I have been tuning a 2009 cobalt ss. The issue that I am running into now is that while the customer drives on the street he makes the car go into limp mode. I drive the car and can not get it to reproduce the same problem. I dyno tuned the car and made 327whp/372wtq on a dynocom dyno. The car never had an issue while dyno tuning but driving on the street the car will go into limp mode after had acceleration. I have tried to reproduce and have had no luck. from light throttle to WOT and every way in between I have no issues. Is there something I am missing on the tune? Located in Charleston sc. so if you look at the map and see something weird we are actually below sea level here. so a map sensor reads .6 to .8 normally without car running.
Car has k&n intake, and turbo back exhaust, and turbosmart bpv
The car had a stage 1 tune on it before it came to me for tuning