WJ issues

[Smokeyyank]

Misfire issues p0353, p0300 and p030x

So trying to figure out what is going with the WJ. here's the breakdown 4.7HO full rebuilt under 10k, new TB, new plugs and some other things. Has been driving fine up until the other night. Parked it to run into costco came out and first it just idled super rough then dies and wouldnt crank over. Limped back home and got a code reader. First go around was p0300 and misfire on cyl 1 and 3. So replaced the coils still ran like crap went and read codes again. Now it was p0353, p0300 and misfire and 2 and 7. It's running really rich just smells like gas. From what I've been looking at it could be a short somewhere, low fuel pressure or 10 other things. Any got some insight?

[Jeep Driver]

 

[mjeff87]

P0353 and multiple misfires would make me suspect a cam (or crank) sensor.

[Smokeyyank]

Had thought about the CPS my dad had it happen to him on the 4.0 WJ, but his was a crank no start. Mine will start and drive, but not well. 

[mjeff87]

Cam sensor, if I had to guess.  If the 4.7 is the same as the 3.7, it bolts into the bottom front of the passenger side head.  It's a Hall effect sensor, like the CPS, and there's a tone ring on the cam timing gear that controls spark.

[Smokeyyank]

Well tinkered with it this am. Now it's worse. Pretty sure a valve seat dropped or a rocker fell off. Battery connection was loose so I tightened it up and swapped one of the "good" coils over to another side that was saying it was bad.  Started it up and was still running rough but not as bad, no CEL. Went on a drive still wasnt feeling right but not as bad as it was then.....just died. Coasted to a side street and went to start it.  Took two tries to turn over finally did but now it has a nasty clunking sound from the top passenger side head. Pretty fn pissed. Luckily wasnt far from home so just got it back and parked it. Now I need to figure how to get it down to the guy that did the rebuild and have him fix it. 

[mjeff87]

Did you ever overheat the engine?  That's what usually leads to the seats dropping.  Could very well just be a fallen rocker or 2.  There's really nothing holding them except for pressure from the lash adjusters.  Not a hard fix to pop them back into place, but a crapload of stuff to take off so you can actually get the valve cover(s) off to get to them.  Stupid engine design.....

[Smokeyyank]

Never overheated, cooling system was replaced with all new stuff and the gauges is always under 205 (have a traildash hooked to see) I know overheating its mist time the cause but......as for the rocker. I've thought that is what it might be. Just pissed off having to deal with it. Especially since it was all just redone.