harleys

Hey guys, I have several jeeps but they are all 4.0's, so I'm new to the 5.2l and new to the ZJ platform.

However, I added a 1995 ZJ to my collection today and it is running extremely rough. It doesn't want to idle, it will barely move under its own power, backfires sometimes. If you give it some gas and can get it up to about 2000rpm it smooths out a little. It died at least ten times trying to get it loaded onto a trailer. The guy I purchased it from said it was running fine and then just went to ****. I don't know how reliable that story is though. I just got it home and may not have time to mess with it tonight, but any help is greatly appreciated. Thanks.

Bustedback

Fuel pressure is the first thing to check.

lilmule234

Take a timing light to it see where timing is might have bad timing chain also check vacuum hoses mouse or some other animal might eat them for you

harleys

Fuel pressure is between 40 and 45 at idle.

dave1123

Intake plenum gasket?

Bustedback

Could be. I would check it out and replace it. It will also give you a look inside and give an idea of how this engine was taken care of.

harleys

Update: selling because I found a 1984 Wagoneer, V8, 4wd.

Bustedback

Well, good luck with that.