iamtall77
20+ Year Contributor
- 185
- 1
- Oct 9, 2002
-
Las Vegas,
Nevada
I've been trying to get my Colt GT (4G63t) running, and it does. However, it sounds like it's got really huge cams and won't idle at all. It has a difficult time just trying to stay running and I have to keep tapping the gas pedal to keep it running. I have good compression and I definitely have spark and fuel. I have a 255lph pump, AFPR set at stock fuel pressure, 2G MAS and my SAFC-II set at +20% with stock 450cc injectors. I'm running MMCD and everything reads good except the O2 readings which read nothing at all.
I thought maybe the O2 was bad and swapped out 2 other ones. Bought a new one. Jumped the wires from the sensor to an A/F gauge. Tried reading directly from the ECU wire. Nothing seems to work. I can't imagine that this would cause so many issues. I can't seem to figure out where the "real" issue is. How can the sensor just not put out a reading? I know it's getting power and the 2 grounds are good. The wire from the connector to the ECU is good. The sensor shouldn't be bad, it's a brand new OE style Bosch unit. What else can I try? Changing the fuel trims on the SAFC doesn't seem to do anything either. This sucks.
I thought maybe the O2 was bad and swapped out 2 other ones. Bought a new one. Jumped the wires from the sensor to an A/F gauge. Tried reading directly from the ECU wire. Nothing seems to work. I can't imagine that this would cause so many issues. I can't seem to figure out where the "real" issue is. How can the sensor just not put out a reading? I know it's getting power and the 2 grounds are good. The wire from the connector to the ECU is good. The sensor shouldn't be bad, it's a brand new OE style Bosch unit. What else can I try? Changing the fuel trims on the SAFC doesn't seem to do anything either. This sucks.