Not always. The rough idle is intermittent and not always so bad but def noticeable. This morning I forced it to throw codes, idle was rough and this time the exhaust smelt sweet, slightly like fuel. Other times the exhaust smells awful.

 

Sweet like antifreeze?? Just trying to think what all 4&5 share?? Compression good?

 

I'm not sure but now that I think of it, kind of. I haven't done a compression test yet but plan to and a leak down test.

 

Is it ever low on coolant??

 

Maybe pull spark plug on 4 and put piston at TDC & see if it's been "steam cleaned"

 

No not that I can tell.

I'll give that look but its kind of difficult to see down in through the spark plug hole though

 

I'm not going to be able to check that out until maybe this weekend. Right now the exhaust doesn't smell sweet. This whole time I've had soot buildup on the exhaust tip.

 

The black is because the pcm is trying to correct the lean by increasing injector pulse width on bank 2. Effectively running it rich....

 

Just got back from the jy. Snagged some 784 injectors (which I have in now) and going to swap out 4&5.

 

Well I swapped out the "bad" #4&5 injectors, took her for a test drive around town and......I'll be damned.....jeep is idling smoother, accelerating better, no misfires or bucking. Exhaust still smells SLIGHTLY, but I'm going to guess the soot build up still in the exhaust pipe. Dumped in another can of seafoam in the gas tank. I'm hoping this finally did the trick, and if it did, THANK YOU!!! to everyone with their helpful input!!