1baddgarage

iTrader: (3)

I've been getting bad mpg lately so I got a aldl cable and freescan software and I'm showing code 48 maf circuit and code 43 esc circuit . With the maf not working properly that will run me in speed density correct? Because the O2s are floating around .8-- to .9-- after a long drive so that's really rich. The knock sensor circuit could throw more fuel at it too right? I have a 94 z28, but someone swapped a later year engine in it because the opti is the new style, they did change the Knock sensor in later years didn't they? I'm thinking the sensor didn't get swapped to my 94 style. Any help would be great. thanks