Join Date: Jan 2006
Location: Columbus, IN
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My 1992 pickup is showing check engine light. I jumped between the terminals to get the codes and this is what I got. 2 flashes then paused 1 then pause 2 then pause 4 then pause 3 then pause 1 then pause 3 then pause 2 then pauses for awhile then repeats the previous again. I cant match them to anything I have found. Can anyone PLEASE help. I am in hopes this will shed some light on the main problem I have which is truck might run 1 day and not start the next. I have replaced all fuel relays and fuel pump still haven't found what is wrong. I do know once it stops running I have checked power to the fuel pump and it is not getting power. Any help would be AWSOME
So you'd have code 21, 24, 31, 32. it's just the numbers in order. 21 is O2 sensor, 24 is the IAT in the AFM, 31 and 32 are both for the AFM (faults in different circuits). If the AFM or any of it's several circuits are bad, you won't get power to the fuel pump nor will the engine run. Either the AFM circuit board is bad or the wiring is damaged. The O2 sensor code you can worry about later, it won't prevent the truck from running.
If the engine isn't running and the key isn't in "start" you won't have power to the fuel pump. you can short B+ ot Fp in the diagnostics connector to bypass the relay or unbold the AFM and hold the door open while the key is in "run"
"You don't get to judge me for how I fix what you break"
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'94 Pontiac Firebird LT1, T56
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