What Did You Do To Your HHR Today?
@wouldy..... make sure you clear the ECM's "learn feature".... I think it's fuse #41 (check, it's on the label in the fuse box) Pull that for about 15 minutes and then put it back, made a world of difference when I put my GMPP CAI on. Also I did note a couple MPG improvement, as long as I kept my foot out of it, which is hard to do now. 
My one question though is this...if you unplug the ECM, wouldn't that also erase any updates and reflashes that have been done at the dealership? I know occasionally there will be updates that the dealer will reflash the PCM for, and I just wondered if unplugging it to reset the adaptive learning would also clear those flashes? Anyone know?



I drove back from MI on 75 and time just flew by. No speeding this time, but it still went quick. Cruise control is an amazing thing.