Do an upper intake clean that should help with the idle problem. May also have a throttle position sensor problem.
SOURCE: 2004 Grand Cherokee: oil pressure fluctuates
if you know for certain that the sending unit is correct and the guage is accurate, then yiu may have big problems.....while the engine is running open the oil filler hole.. is everything wet with oil? or does it look dry or just a little lubed? you can allways install an aftermarket oil pressure guage(crappy tire) if you get the same results with that then you may have a week oil pump....worst case scenerio... need an engine rebuild as the moter may have wear issues.does the pressure slowly drop as the motor warms up? at idle ? does it jump up when you step on the gas?
SOURCE: 1999 Jeep Grand Cherokee Died while driving home
check the fuel pump fuse/relay, could be just bad enough to cause an intermittent start/no start. and check fuel pressure,spark and the crank position sensor.
SOURCE: 95 2.5 jeep wrangler stalls consistantly and will
I had the same issue with my 4.0, I went through all the same BS you did and in the end it was a faulty fuel pump. Pricy i know but im sure thats your problem
SOURCE: Jeep liberty 2002.....ignition key lock
Most commonly it is the key is worn out. If you have a spare key or your current one is not too badly worn, have a copy of it made and try it in the switch. You will have to have the copy key "coded" so it will disable the anti-theft system in order for the engine to start. If the new key doesn't fix your problem, you will have to replace the tumbler assembly.
SOURCE: jeep liberty 2007, window regulator died. What is
take off door panel and tap with a small hammer
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