Well I own a 89 Cherokee and it runs alright just has batter stuttering and backfire problems. I just replaced plugs wires and cap and still nothing. Ive done research and yet to find really any pen point description of whats wrong with it.

I know the PO said he upgraded the injectors to bigger but thats all I know.

Off Topic:
Guy on craigslist saleing 5 inch coil springs full leaf pack and brand new arms still in the box for $300. Worth the buy? (He has no proof saying they are 5"

 

Focus on getting it to run right, then worry about lifting. At 5" you'll have tons more to worry about than just the springs.

What do you mean by bigger injectors? You sure its not just 4 hole injectors? No need for bigger ones unless you have the demand for it, turbo, supercharger, etc. That could be the cause.

I would do some diagnosing, tho. Check fuel pressure. Make sure your grounds are clean and fresh.

 

welcome to the site.. i would focus on getting it to work correctly before you do any kind of lift... you have a renix 4.0 just so you know here are some tips that can help you out...
https://www.cherokeeforum.com/f51/cr...x-tips-153657/

 

He told me it was 4 hole spray. I have no way to test fuel pressure till this weekend. He put a cold air intake in its place and all the little vaccume lines he kinda just left sitting there.

 

that could be a problem... might be a vac leak..

 

Backfire sounds like timing.

Cap and rotor replaced? Put on incorrectly?

 

I kinda though timing to so Im gonna show my uncle and let him figure something out ill keep posted Thanks

 

Timing is not adjustable. Lack of fuel due to a bad fuel pump will cause backfiring.

 

Well see I can be under it and smell the richness of the fuel so its has more fuel I kinda thought go to junk yard get stock airbox and stock injectors and go from there

 

Well I swipped a set of clean looking injectors off a cherokee (1 hole spray) Free of Charge and gonna try them out so Ill let you know

 

Ok I wanted to tell everybody I fixed tye reason my.jeeps been stuttering and backfireing. On cylinder 6 my plug in that goes on the injector hasn't been making connection and skins I put to and to together it runs like a champ now

 

congrats on the fix... that would do it for sure...

 

What did skin have to do with the fix? Busted knuckles?

 

Ha I ment since I put 2 and 2 together it works great now but since I have the 4 hole injectors how beneficial would it be to put them back in?

 

better fuel mileage... more pep... suppose to be better... but i do not have them yet...