Where is ground for Oxygen sensors ?
IS there suppose to be a ground on the O2 sensor harness? THere are 3 connectors on my harness. 2 are going to the O2 sensors and the othe wire goes to the some sensor in the side of the oil pan... what is that sensor for and what is it called? I took my harness from a 89 GT Mustang in the junkyard. Im trying to figure out why my car is running like a V6 with a rough idle... I dont know if this makes a difference but the braided wire thats on the firewall I have it grounded on the bellhousing bolt on the tranny. and the orange wire coming from the fuel injector harness is grounded on one of the upper intake bolts.
88 LX 5sp
Ported stock intake, GT40P Heads, ASP crank pulley, Ford Motorsport shorty headers, Mac O/R H-pipe, Flowmasters, Tri-ax shifter, King Cobra Clutch