ok so i just bought a 99 grand Cherokee limited edition for 650.00. i bought it from a friend knowing something is wrong with the motor. it has the 4.7 HO. im new to the jeep section here. im from over in the 2nd gen ram area. so i dont know anything about these 4.7s.

but anyways. the problem is its not starting. it cranks and fires a few times and dies. it sounded like its only running on like half the motor when it started the day i got it. since then it wont fire and run on its own. i thought i might as well check the spark plugs before tearing into the motor. so i pulled them out and they were horrid so i changed them and it still wont run.

if anyone has any info that would be awesome.

 

I don't know how that's possible, the HO version of the 4.7 wasn't produced until late 2001 and only came in a few, select '01 pilot models, it officially debuted in 2002 when it was the standard engine in the Overland series and was an option in the Limiteds...

http://www.wjjeeps.com/ho_engine.htm

But regardless, look at the oil for a sign of coolant, if one side was running and the other was not, I'm betting it overheated at some point and you got a cracked head...

 

Well your probably right about the HO thing idk for sure. Never had one of these Jeeps before.
But anyways I checked for coolant in theoil and there is no sign. I also previously drained the Coolant and she was a nice beautiful green.so anyothrr suggestions would be awesome... thx in advance. Matt