2006 Jeep Grand Cherokee Questions

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Battery and alternator test good. Changed starter and starter relay. Got jeep to start a couple times but now only starts if I put it in neutral.
When it is idling the jeep reves up. Also that it's going to let me sit. Today it made a rough clonking noise. ( almost like it is going to stop) She said that's from the battery. My husband said it an oxygen sensor...
When I start my engine it makes a loud ticking noise, it hangs around until you have driven it for a while. If you cut it off it ticks again but not for long.
My backup lights on my jeep have decided to up and not work. Yes ive replaced the bulbs and checked all the fuses, by all I mean every single one because I know how they like to wire things stupidly. Any ideas on what...
Have also replaced, water pump and thermostat, just looking for help, not sure what to do next.
Mechanic checked, brakes working, no code set. The warning lights are continuous. I am not driving the car.
It doesn't get warm in the jeep at all. it didn't have AC and it doesn't have heat. How can this be fixed? are the two related?
My reverse lights quit turning on and I cant find why. I have checked the fuses, replaced the bulbs and still nothing. I know a netral safety switch controls this but I cant find anything on where it is or what it loo...
When I drive on a highway I got an air comes in even the ac is not working!! The temperature of this air depends on how the ac was turned off. If I turned off the ac on cold temp. the air is cold but if I was setting...
Lights come on I tried putting jumper cables on and it still wont do anything.
So the jeep get about 140,000 miles . It was driving fine , the RPM was little not steady , So time for some tune up , i used 2 seafoam in the gas tank back to back , then i change the spark plugs , air filter , the ...