Originally Posted by cruiser54
Vacuum is too low and is indicative of retarded ignition timing. The MAP is probably telling the ECU that the engine is under a load when it's not, so the ECU adds fuel. Are there any adjustments on the Howell?
Any vacuum leaks? Have you tried spraying throttle body cleaner arond the intake manifold to head to see if there's a leak there?
You are exactly right. The low vacuum is fooling the MAP and in turn the MAP has the ECU dumping fuel.
I borrowed a friends smoke machine and the motor is tight. Couldn't find any leaks anywhere. All vacuum hoses are new. My friend who I borrowed the smoke machine from has his own auto shop. He is going to come over tomorrow and see if he can find something. So far he is stumped with me just giving him info over the phone. I keep thinking I'm going to find something simple (or not) but so far nothing. I'm going to give Howell a call tomorrow too and bounce the info off them.