The O2 sensors were removed when I bought the car. So, I got 2 new motorcraft O2 sensors and new O2 sensor harness (which plugs into the main harness). After installing these, I started the car for first time and it was normal. I stopped the engine and tried to start it again but this time the RPM went all the way to 3K, hanging there and fuel smell was getting more and more all over the place.
Now I disconnected the O2 harness and it is back to normal! Any idea why did that happen? I thought my A9L will recognize the sensors and run normally.
These are some of my car’s details:
•Engine:
302 CID BOSS BLOCK with GT-40 HEADS AND B CAM
FRPP Cobra 93 intake
Accufab 70MM Throttle Body
FRPP 24 LB/HR injectors
BBK 190 LPH fuel pump
BBK adjust fuel pressure regulator (40 psi).
PRO-M 75mm Mass Air Meter
BBK Cold Air Fender Well intake
•Exhaust:
HEDMAN equal length headers
2 ½ MAGNAFLOW X-Pipes
MAGNAFLOW Cat-Back
•Ignition System:
MSD ignition system (coil, distributor, wires), timing set on 12 Deg
Optima battery (RED)
Motorcraft spark Plugs gapped to 0.040
•ACCs:
March Underdrive pulley set
Air pump is deleted (No EGR )
Now I disconnected the O2 harness and it is back to normal! Any idea why did that happen? I thought my A9L will recognize the sensors and run normally.
These are some of my car’s details:
•Engine:
302 CID BOSS BLOCK with GT-40 HEADS AND B CAM
FRPP Cobra 93 intake
Accufab 70MM Throttle Body
FRPP 24 LB/HR injectors
BBK 190 LPH fuel pump
BBK adjust fuel pressure regulator (40 psi).
PRO-M 75mm Mass Air Meter
BBK Cold Air Fender Well intake
•Exhaust:
HEDMAN equal length headers
2 ½ MAGNAFLOW X-Pipes
MAGNAFLOW Cat-Back
•Ignition System:
MSD ignition system (coil, distributor, wires), timing set on 12 Deg
Optima battery (RED)
Motorcraft spark Plugs gapped to 0.040
•ACCs:
March Underdrive pulley set
Air pump is deleted (No EGR )