2000, 4.0, AW4.
Intake, (lack of) exhaust.
Lets see, where do I begin....
Two years ago my 4.0 crapped out from unknown causes. Probably had something to do with the 0331 head, but I digress...
Had a local mechanic put in a donor engine from a rolled XJ. Also a 2000 with ~77k on the clock.
Ever since then my engine will "stumble" for lack of better word at lower rpms, especially at idle. What I mean by "stumble" is it seems like 1 of the cylinders fails to fire or perhaps fires too soon? I am not sure, but it makes a definite change in the exhaust tone and shakes the jeep slightly.
In my limited knowledge of automobiles, I ran two full tanks of gas with Lucas oil injector cleaner through it. No change.
Also, I dont think this should affect the engine but the second 02 sensor circuit is shorted, so it is unplugged.
At this point I am unsure of what else to do.
Any suggestions?
Intake, (lack of) exhaust.
Lets see, where do I begin....
Two years ago my 4.0 crapped out from unknown causes. Probably had something to do with the 0331 head, but I digress...
Had a local mechanic put in a donor engine from a rolled XJ. Also a 2000 with ~77k on the clock.
Ever since then my engine will "stumble" for lack of better word at lower rpms, especially at idle. What I mean by "stumble" is it seems like 1 of the cylinders fails to fire or perhaps fires too soon? I am not sure, but it makes a definite change in the exhaust tone and shakes the jeep slightly.
In my limited knowledge of automobiles, I ran two full tanks of gas with Lucas oil injector cleaner through it. No change.
Also, I dont think this should affect the engine but the second 02 sensor circuit is shorted, so it is unplugged.
At this point I am unsure of what else to do.
Any suggestions?