Hello all,
Recently during tuning the boost gauge on my MPtune profile was only displaying 8.1 psi when in fact I was actually at 13.5 psi. I was working on a detonation problem. The guy helping me suggested that something may be wrong with my map. I was using the map sensor that came factory-installed . I switched to another which had the red printing on the decal indicating a turbo map. The part numbers on the two maps were the same but the code that came after that was different. The one I used had "AA" on the end which tells me there were at least 2 revisions.
The result was correct psi numbers on the profile gauge and a huge reduction down to a tunable 2.0 degre's pulled out.
Jeff1234