What would cause my engine to not have a high idle on start up? I tried my friends computer and it didnt make a difference. I really dont want to have to swap in a different harness. I am running a b cam without a dyno tune. The car is running rich and thats another issue. I thought maybe the adjustable fuel regulator was bad so i pulled one off a towncar with a 5.0 in it. After i installed it and started the car for once the exhaust smelt properly burnt and i could tell the motor was running better but know two days later its back to smelling rich. please help me....