OG_Dakota

Hello I am Dakota and a proud Ls owner, I am new on here and just wanted to get a good opinion on what my GTO's issue problem could be.
The car has a Lunati .599/.601 Cam, longtubes, exhaust and other bolt one. I recently got the Cam installed and when I start the car it will idle at 2000 Rpm till I pump the brakes about 4-5 times then it goes to normal and I can drive it around awhile. If it's anything over 30 minutes on a highway it will jump back up to 2k till I stop and pump the brakes again. Anyone know the issue. It has been tuned but not dyno tuned.

Nmbr1GMfan

iTrader: (1)

If the problem started with the cam install, then it's associated with that. Vacuum leak or more than likely a tune issue.

gametech

iTrader: (1)

Even if it is a vacuum leak, it's still a tuning issue. Any competent tuner could diagnose a mechanical problem within reason. That size cam will require a knowledgeable tuner.

kinglt-1

iTrader: (26)

Cam duration @ .050 with the LSA give us a much better idea of what you have opposed to just lift.