2008 Jeep Grand Cherokee Questions

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When I turn the key it just continuously turn instead of starting it has gas but will not turn over
i hear a click , so i turn it off and try again and lucky for me it starts
When going over a speed bump I'm hearing a creaking sound from the front of my Jeep.
I put new crank, cam, and coolant sensors on and new starter, the Jeep still turns really slow and won't start
I'm driving normally when it's slows down with little power
How long have you had this problem? Few months
I always test thw oil and i changed the oil watch but when ever the temperature goes to normal the oil lamp goes on only when my rpm is 550 if i press a little gas it goes off when the rpm reaches 550 the oil lamp goes on agian but if my temperature is below the normal the oil lamp does not goes on
Will a weak or bad battery make my 08 Jeep laredo crank slow even after I charge it or get it jumped from another vehicle?
Able to unlock doors but not back lift gate.
I have a problem, about 4 lights keep coming on (engine, tire tract, espBAS, alarm) along with a warning on the information center reading Transmission Over Temperature. My mechanic has ordered some module to correct the problem with the lights, but told me it will not correct the warning of Trans Over Temp. Can someone give a couple of possible things to check, for a possible solution ? Thank You.
Lost the smart key on girlfriends car and wondered how to get around without using it temporarily
I have very little power when i step on the accelerator.
my Jeep has very little power when i step on the accelerator. I was told it is the input speed sensor. What is that and how much will it cost to replace it?
Jeep Grand Cherokee '08 Check Engine light came on. Drove into parking lot and went into store, came out and engine would NOT turn over. Friend cleared 4 codes: PO152, PO300, P1129, PO152 and light went out and engine started. Drove yesterday no problem and no CE light and bought ACTRON PLUS Code Scanner. This morning engine will NOT turn over. My scan only revealed one code regarding ABS which I cleared, however the engine will NOT turn over. Question 1: Is the engine not turning over a safety measure as "limp mode" in other cars? Q 2: Is there something seriously wrong with the car that clearing the codes did not work the second time? I've only had the car one month, from a reputable dealer, and all CarFax reports clean. Also, new to JEEP so not educated on its computer/engine. Please HELP!!!
Does anyone know how to replace the 4 O2 sensors on a GC with a 4.7 and calf. emissions. I can manage to remove them but can get to any of the electrical connectors as they seem to be above the transmission and it is hard to maneuver around the exhaust and drive axles.
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