TIme to start the question asking. I didn't want to be the first but I guess I have to. My Autometer air/fuel guage goes down about 5-7 bars when I turn on my headlights. Maybe a bad ground. (I have it bolted onto the unibody at the moment.) And when I'm at full throttle, The gauge automaticaly starts going towards red and it drops off. My mods include only the FWD Performance logic module (14 lbs. of boost) and a K&N filter. My fuel pump, gas tank and lines are new and my injectors are fine. Hopefully I gave enough info for you guys and please help. Thanks, David
Air/Fuel guages are very sensitive to grounding, try grounding the guage right to the - post on the battery.
Yeah I had the same problem with mine, it was grounded to the firewall and it was very erratic now grounded to the batt. and it bounces back and forth correctly.
