The vacuum is at about 20 in Hg. Then when parked or in neutral it goes all the way up to 26 in Hg. Could it be a vacuum leak? Would that cause acceleration problems too?
Hello, I have a 2015 automatic mustang GT that has a cobra jet manifold, vmp 67 mm twin throttle body, pmas cold air intake and recently got a tune from Palm Beach Dyno. Before I got tuned (I do not know who the previous owner had the car tuned by) the car would die on idle after trying to start...