Hey everyone,
I have an 07 Cobalt SS with ZZP stage 1 kit (3.1 pulley), with ZZPs canned tune, and intake.
The car ran fine for the first couple months after installing the kit. Although it did have a fuel trim rich code.
After the first couple months it developed a problem that occurs only at WOT. it will buck and sputter and has no power at all.
I am a noob when it comes to tuning and I'm looking for the easiest way to lean out my fuel trims all across the board but especially at WOT.
I've attached the tune file and a log for reference.
Thanks,
Jacob McDearmid.