BAKERrps13
08-25-2009, 08:50 PM
Hey guys, other than the MAFS, what else would cause my SR to run so rich it dies at idle?
After repairing a few issues with my redtop SR (all turbo gaskets, steering rack, BMC, fan controller, Z32 MAFS) my car now runs so rich it stalls after 10 seconds of idling. The car was running perfectly fine before I started this group of repairs.
Current Condition:
-Start the car (with some trouble), car starts to erratcally idle around 3-4k (MAFS unplugged) or erratically idle at 4-5k (Z32 or SR MAFS installed), then dies after 10 sec.
-Pulling the spark plugs shows they are covered in fuel along with some standing fuel on the pistons. All cylinders the same so no broken o-rings.
-SAFC was set correctly for each MAFS; 6in 6out for SR MAFS; 2in 6out for Z32MAFS; 4cyl arrow up to the right.
What I have checked:
-I spliced and soldered the SR MAFS harness back into the newly installed Z32 harness so that I could verify if the problem was a broken Z32 MAFS, but it had the same effect. SAFC was updated for either MAFS I put in.
-When the motor is off, SAFC shows sensor voltages to be in the 0.01V range and throttle at 0.4V. If I ground the input voltage, it reads 0V.
-No continuity between the wires in the MAFS harness (except for the ground wires of the Z32 harness)
My only thoughts on direction:
-It seems the MAFS are good, but it must be the problem - what else would cause it to spray so much fuel?
Thanks in advace for any help. James
After repairing a few issues with my redtop SR (all turbo gaskets, steering rack, BMC, fan controller, Z32 MAFS) my car now runs so rich it stalls after 10 seconds of idling. The car was running perfectly fine before I started this group of repairs.
Current Condition:
-Start the car (with some trouble), car starts to erratcally idle around 3-4k (MAFS unplugged) or erratically idle at 4-5k (Z32 or SR MAFS installed), then dies after 10 sec.
-Pulling the spark plugs shows they are covered in fuel along with some standing fuel on the pistons. All cylinders the same so no broken o-rings.
-SAFC was set correctly for each MAFS; 6in 6out for SR MAFS; 2in 6out for Z32MAFS; 4cyl arrow up to the right.
What I have checked:
-I spliced and soldered the SR MAFS harness back into the newly installed Z32 harness so that I could verify if the problem was a broken Z32 MAFS, but it had the same effect. SAFC was updated for either MAFS I put in.
-When the motor is off, SAFC shows sensor voltages to be in the 0.01V range and throttle at 0.4V. If I ground the input voltage, it reads 0V.
-No continuity between the wires in the MAFS harness (except for the ground wires of the Z32 harness)
My only thoughts on direction:
-It seems the MAFS are good, but it must be the problem - what else would cause it to spray so much fuel?
Thanks in advace for any help. James