- Location
- Westminster, SoCal
OK, so here's the scoop:
- 97XJ manual transmission
- Started throwing cylinder 1 misfire code after pulling it out of the driveway where it was parked for just over a month.
Since then I have:
- Replaced the distributor (my old one was a wee bit wobbly)
- Replaced cap and rotor
- Replaced plug wires
- Verified that I get spark to cylinder 1 (I got an inline spark tester where it shows spark as it occurs)
- Swapped plugs around (misfire stayed with the cylinder)
- Checked compression: compression is good
- Checked vacuum and it seemed stable (though I had a cheap vacuum guage)
- Swapped injectors around (misfire stayed with the cylinder)
- Bypassed the harness from the PCM to the injector (No change)
- Swapped in a different PCM (No change).
NOw here's what I"ve observed: It seems that when the engine is cold at idle the misfire does not really happen till the engine warms up.
So far that last item is my only clue!
Anyways, this is frustrating: I had couple wheeling trips I wanted to go on but at this point I can't cause the jeep is not doing good
So any ideas/thoughts as to what is wrong and how to fix the damn thing are welcome....
- 97XJ manual transmission
- Started throwing cylinder 1 misfire code after pulling it out of the driveway where it was parked for just over a month.
Since then I have:
- Replaced the distributor (my old one was a wee bit wobbly)
- Replaced cap and rotor
- Replaced plug wires
- Verified that I get spark to cylinder 1 (I got an inline spark tester where it shows spark as it occurs)
- Swapped plugs around (misfire stayed with the cylinder)
- Checked compression: compression is good
- Checked vacuum and it seemed stable (though I had a cheap vacuum guage)
- Swapped injectors around (misfire stayed with the cylinder)
- Bypassed the harness from the PCM to the injector (No change)
- Swapped in a different PCM (No change).
NOw here's what I"ve observed: It seems that when the engine is cold at idle the misfire does not really happen till the engine warms up.
So far that last item is my only clue!
Anyways, this is frustrating: I had couple wheeling trips I wanted to go on but at this point I can't cause the jeep is not doing good
So any ideas/thoughts as to what is wrong and how to fix the damn thing are welcome....