montanameep

Ok so i took out my 95 zj, has. the 5.2, well i sunk it up to the drivers door with mud an water, was stuck there for 5 hours the rig idling the whole time, now this is my problem when i go to get on it it cuts out almost like in hitting the rev limiter but at 2-3500rpm. i though maybe the fuel filter so i replaced that an no go, replaced the air filter an still no go... in at a loss, i ordered a new cam sensor for it cauase I'm leaning towards that but I'm not sure... any info would be great guys...

Bustedback

Before you start throwing a bunch of sensors at it, do some diagnostics. How long has it been since a tune up was done? Were the spark plug wires replaced at the last tune up? Check the fuel pressure. Have the exhaust checked for restrictions. Is the check engine light on? You will spend way more money by just throwing parts at it until you finally find the problem, if you ever find it before giving up on it.

dave1123

It's entirely possible that even though it was running, mud and water could have invaded the muffler and cat. Disconnect the pipe at the converter and see how it runs.

montanameep

I'm not running a cat... the engine light would pop on an off before but now it don't.. i did the codes an am only getting 12 an 55... its weierd its almost like it dose it when i down shift from overdrive, it don't do itwhen i take off kinda hard it gos past 3k no problem.. it just started doin this after wheeling sunday... my speedo is messed up as well its jumpy... i i am pullin my cap off today an will do a fuel test on saturday, but dose it sound like a fuel problem??? I got a vid i could post of what it dose if that will help???

dave1123

Okay, this might help but IDK if it has anything to do with your problem.

Once I sat in traffic stopped at an accident scene for about an hour and a half, idling in the hot sun in my SS Camaro. When we finally were let go, I jumped on the throttle hard because I was pissed. After redlining it in 2nd gear, it started running real badly and bucked and snorted all the way home. What happened was all the carbon that had built up on the spark plugs while idling melted and formed a glaze that had to be chipped off. I just put a new set of plugs in it and it was fine.

My point being, when you got out of the mud hole, did you wail on it? Maybe you glazed the plugs like I did.

montanameep

I'm pullin the plugs as we speak so far they look good...

montanameep

Plugs look good. a littlr whitish greyish but they deff ain't bad, they almost look new... could it still be a sensor even if it ain't throwing a code???

montanameep

so i did a fuel pressure test, it flutter's between 37-42 ive or take an when i shut it down it blead's to about 37-39 in 5 min's.... so dose it sound like my fuel pump/pressure regulator??

Bustedback

Nope

dave1123

My plugs looked good too, but they had a yellowish coating on them that flaked off when I scratched them with a knife blade. That coating was conductive and shorted them to ground across the insulator instead of the gap.