na grfnkl, I would think that the PCM timing that might of been placed by DHP wouldnt have any major affect with new coilpacks that only do a stronger spark... I put those things on and I FELT the difference in idle which is good, and it was doing it's best to run smooth but theres something else going on far deeper than coilpacks...
it drives, just not very well.... or very fast lol, and it shudders when accel and rpms dont seem like they want to go past 1200-1500 ish... I only drove it down the street and turned it around but even that was like... Ahhhh, it's still f**ked lol
I have a guy comin out w/ his crazy scanner... from what he told me it sounds like a GMTechII, just without the PCM programming *whew* .. I let em know on the phone... NO PCM WRITES lol