I bought a Diablo Delta 2 Stage chip in Dec of 2003. I installed it and tested it a few times and I got pinging every time. I ran 91 octane thru it a few times and then i tried it again and it still pinged. I then had trouble starting it one morning so i took the chip out. It started up that night but the check engine light was on so i took it to the shop and they said i had 2 glogged injectors so they cleaned them. I haven't tried the chip again since. Do you think I need to have the chip reprogramed? I don't think they reflased my computer ether. And also does the elvation matter because i live at about 4500-5000 ft.
Thanks for your time Mike.

 

If you have clogged injectors your vehicle is likely running very lean and when you put a chip in that will cause pinging and starting problems. Try it out after getting the injectors cleaned and let me know how it does...