So I installed a boost gauge yesterday, and I noticed that it only goes up to 5psi and 6psi if I floor it. Anyone know what could be the problem here? How much should it be running. Car always feels like its in a high gear when in first or second.
Yeah, a 3rd gear or 4th gear pull up a hill on the freeway will show you what your max boost really is. If it's always 5 or 6 psi, that's a classic symptom of the wastegate not under ecu control, and just running open loop. Usually the TCV or a vacuum line as Avboden said.