[Exgermanowner]

The issue - my car on the road course will not read 100% throttle in either the Cosworth charts or PI Toolbox. It was reading like 96.5% this past two days. In one area of the track does it read 100%, but not consistently. YES my foot is buried through the floor board. This has been going on for the three events I've done in the car.

So i had it at the dealer last week prior to the last event which was just this week (Mon/Tues)and they said they did a software update and replaced the black piece on the side of the throttle body that my buddy and I call BS on. On my way home that evening I recorded two full throttle runs after the car was warm and it displayed 100%, but not at the track.

My buddy who is a fellow member on this board and has the same car except being a 17', we stuck his memory card in yesterday while at the track and it shows 100%. I also have a file from another friend with an 18' from an event we all three did in November and his shows 100%. We also took a spare stock throttle body and put it on my car, yesterday I ran a session and nothing. Still not registering 100%.

The dealer didn't bleed the system despite my request(they move a lot of vettes)and the guy i deal with is their vette guy and he knew about the LT4 air in the system issue, so that ticks me off in hindsight and wasn't happy at the time they didn't do it. Their reason was the tech determined it wasn't necessary due to the software update.

My car is bone stock btw.

So just wondering if anyone else has run into this. We're thinking its in the drive by wire pedal assembly at this point, maybe air in the system.