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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> jeep runs rough after wash! bigwrench3311
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Topic Review (Newest First)
10-03-2012 04:52 PM
bigwrench3311 4.7Liter has no dist. ect. It's mpfi. there is no inj. pulse #6 cyl.only. hope this help for ideas?
09-26-2012 07:58 AM
cdminter59
jeep runs rough after wash! bigwrench3311

First check to see if check engine light comes on when you turn the key on. If it does not you have lost power or ground to the computer. First check the fuse for the PCM. If okay unplug the Throttle postion sensor or the map sensor to see if you get a referance voltage with a digital ohm meter. This comes straight from the computer if you don't have any voltage there then you have a short in the harness or the computer is not any good. If you do have voltage then check the crank position sensor or the camshaft position sensor. If these have voltage then check the O2 sensors. Please in the future do not put water in the engine compartment.
09-26-2012 07:08 AM
Irelands child After an engine pressure wash, it cost me a throttle position sensor(TPS) - and I was dumb enough to do it twice. It also cost a coolant temp. sensor. You need to get a code reader plugged in to the car 'puter to tell you where you '$crewed up', not do the $hotgun approach.
09-26-2012 01:28 AM
59RAMBLERSUPERWAGON Water in distributor, coil, plug wires etc dry it all out and move on. I don't ever spray wd40 in distributors, it causes fouling down the road.
09-25-2012 03:31 PM
delawarebill
no fire

I'd say your ign sys is not as water proof as a jeep should be.. try spray'n WD40 everywhere..
09-25-2012 03:03 PM
bigwrench3311
jeep runs rough after wash! bigwrench3311

1999 jeep grd.cheeroke lost inj. pulse after press. wash, any ideas? please help! thank you.

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