Hey guys! I just picked up a 2000 Jeep Grand Cherokee with the 4.7 v8. It runs like a champ but has an issue with stalling. If I rev the engine up it won't stall, but if I hold the throttle at about 2,000 rpm then let off the idle drops low and it dies. I cleaned the IAC Valve but it didn't help. Any thoughts or suggestions?

 

Replace the IAC. Cleaning is just a waste of time in most cases.

 

That's what I was thinking but figured since it was covered in crap I'd attempt it in hopes it would fix the issue. I'm gonna get a new one tomorrow morning. Just wondering if any other things may cause the issue. All I can think of is the IAC.

 

I had this same exact problem with my 2000 Jeep Grand Cherokee AND again in my 2003 Grand Cherokee. I took it into a Jeep dealer and they raked me over coals and eventually I had paid a couple thousand bucks for them to replace things that weren't the problem. My Jeep kept dying. Eventually, last, they replaced the CPU (or PCM I can't remember what it's called). It is basically the computer of the Jeep. It is about the size of a large piece of bread and it's silver metal. My Jeep no longer dies, problem solved. The CPU I purchased was a used one off another Jeep from a scrap yard and it's still going strong 6 years later. So if I was you, and I was having this exact problem, I would START with replacing the PCM computer FIRST. Good luck.