jbryson489

When I start my 98 xj it revs up to about 2k. As soon as I put it into gear it drops and almost or sometimes dies, and when I start driving it sputter, and what's to die when I slow to a stop. So far I've changed my o2 sensors and tps. What would be a good step to take next?

Greyly Driver

https://www.cherokeeforum.com/f23/te...itings-136452/

Radi

Those are classic symptoms of a vacuum leak. Grab a can of brake cleaner, spray around the intake manifold, vacuum lines, etc. You'll hear the idle change when a leak sucks it in. An unlit propane torch works well too.

jbryson489

Awesome. Thanks guys, I hope it works.

jbryson489

Alright, so I checked the grounds and they look in good condition. I used damn near a whole can of cleaner and cant find any type of vacuum leak. I pulled the tb off cleaned real good and replaced the iac valve, and she ran great. now after a couple days its starting to act up again. Doing the same things. Revs real high and wants to die when I put it in gear. If I don't let it warm up a bit before leaving, it seems to have a hard time shifting, revs high then shifts. And then as I'm driving I'll feel little stutters every once and a while. It all goes away after about 10 to 15 mins of driving

salad

Have you tested/replaced the TPS yet?

Xj88

I would think its a tps, try to find a vaccum leak but not sure if thats gonna be your issue.

N20jeep

Tps or iac

Xj88

Iac..that's what I was trying to think of...it plugs in near the tb...I had the same problem..cleaned it up and fixed the problem

jbryson489

Yep, I replaced the iac and tps. I'm still looking for a vacuum leak but I just can't find it.