|Originally posted by Celthora87GT:|
Yes. It ran well. Rich but ran like it should before i brought it to get tuned at a local shop. They ****ed something up and now it runs like garbage. I am using hptuner and yes to the lq4 data and the other questions. I have scanned and recorded it. No dtcs but for some reason and with no pattern my injector banks pulse width will go from 3.5ish msec to 0 and back.
HP tuners editor should be able to tell you what changes the tuning shop made to your PCM. Did you save your original tuning file? If you can't figure out what's wrong contact Ryan at Sinister. He has loads of tuning experience on these engines and should be able to get your PCM running properly again.
If you insist on the DIY approach, download one of the shared tuning files for a similar set up from the HP Tuners website. Use the compare feature for all tuning parameters and find out where the differences lie.
Just from your report; your injector pulse width, if it really is 3 msec is WAY off. At low RPMs you should be in the area of 150-200ms and at high RPMs like 10-20 ms. Your engine may be starving for fuel.
------------------ " THE BLACK PARALYZER"
-87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
[This message has been edited by Dennis LaGrua (edited 05-29-2015).]