View Full Version : Need help diagnosing boost issues

10-20-2010, 07:42 AM
I have a k04-015 with stock injector with unitronic tuning. So the issue i'm having with the boost is that it's only boosting 16psi instead of 18psi. Car is runing strong and smooth. What kind of things should i check? I've already replaced the n75 to another stock n75. I use to have a giac chip on my previous ecu which did boost 18psi but that crapped out so i got a another used ecu and got the unitronic stage 2 flash installed. The only thing i can think that is different is I use to run ngk bkr7e and since i got the unitronic flash i'm running bkr6e plugs as i didn't have the other ones at the time. Any other suggestions?

10-20-2010, 07:56 AM
16 sounds normal for a K04 tune. I know that uni has slightly less aggressive tunes compared to giac