Got my lsj back from tuner after engine build. Car idle sometimes doesn't sometimes. At idle car is at 12-15 vac and 22% throttle. When I put my foot slightly on the gas it goes to 18-22 vac and throttle position goes to 18%.
Swapped tb to ls4, nothing. Went to new stock tb, nothing. Car is now on tune for stock tb. Still won't idle. 1200 rpm is what it's set for.
Any ideas?
Also I'm very new to tuning. It was done by a pro.
But I'm learning.