jim kinney
Registered User
I have a 89 aod sc with k&n panel filter, removed airbox, aod been rebuilt with shift kit, magnum powers raised top, 3 in. Y pipe, no resanator , two turbo mufflers, coustom down tubes, high flow cats, 180 thermastat, high speed fan on with key mod, and 10% pulley yet to be installed. My question is when the car shifts from 2nd to 3rd gear there is a little spark knock like maybe its running lean. I replaced spark plugs, wires, fuel filter all with motorcraft parts. Is my stock fuel pump up for the task? This car really runs well other than the above problem.