I've got a 94 Z28 A4 with 124,000 miles on the clock and its got a back fire... only in overdrive. It accelerates normal first, second, third, when it drops into fourth it starts sputtering... i check the plugs, optispark is not cracked, wires look good... has anyone dealt with this before?
-
Black 95 z28, 60k miles, 10 spoke SS rims, k&n cai, flowmaster,hypertech 3, 3.42's, running 13.8@ 101 with slicks -
Did you check your fuel pressure yet? My car started doing the same thing. After a lot of time and effort, I found the culprit, it was the fuel pump. Fuel pressure should roughly 45 psi with key on and car not running. Hope this helps, good luck.
Comment