hypertech junk
Here's my advice if you want it: If you tell customer support that it appears the HPP III has corrupted your PCM, they may offer some help. Let's hope so anyway since they were/are a sponsor here. Your best course of action at this point is to post the results of your contact with CS. If you get no help, let us all know and then go searching here on LS1TECH for someone who can mail order repair your PCM.
A tune for the LT1 is a good idea in my humble opinion because they tend to be tuned from the factory in rich form. Besides, where you are now, other than headers you are going to start spending quite a bit for each horsepower you gain. A $125 power tune will now be your least expensive improvement; even if you only get 10 or 15 hp.
BTW, i made a mistake by calling your programmer a HPP III. It is probably the HPP II or HPP + (like I had). What is the model # on the back label?
Last edited by 01Z28M6; Mar 28, 2010 at 09:26 PM. Reason: adding content and asking question.
Last edited by bruce80; Mar 28, 2010 at 09:47 PM.


