Discussion Starter · #1 ·
I just fully deleted and tuned my lbz duramax will the HSP high flow bundle kit, and for some reason the truck now gives a check engine light (P0087) after 3,000 rpms. And I cannot figure out the problem. I just brought the truck in august with 275,000 miles on it. And it does have a airdog 100gph lift pump. And I also installed a PPE race value hoping to fix the problem. The truck did not have this issue before the HSP upgrades. I have a fear that it is the cp3 but I would rather not have to replace the cp3 if I really don’t have too. I have also looked for any leaks and cannot find any. And I know for sure it’s not the injectors because they were just replaced and are giving absolutely prefect balance rates. Also the truck was already tuned when I bought it but I do not know exactly what kinda tuning is down to it besides it is tuned with efilive with the dsp5. I am really stuck on where to start to address the issue. Any help would be greatly appreciated, Thank you.