jstewart1960

I have 1992 jeep cherokee 4.0L auto 4wd that jerks and sputters like power shutting off or something, put new rotor in, cap, wires , and plugs, o2 sensor also, can my problem be the catalytic convertor. It is getting gas also so those arent my problem.

Belto

dont think is the cat, you can check by hitting it, to see if something is loose there or go have it scan at the local parts store,, many do that for free

and welcome to CF

jstewart1960

we scanned got code 41 and 15, speedometer hasnt worked for over a year, but hasnt started running bad until last month.

XJ Stryker

This is your most likely cause.

https://www.cherokeeforum.com/showth...7282#post67282

BlueXJ

I doubt that you are right on this one Stryker.
Check the fuel pressure at the rail. If it is below par then you may have a fuel pump trying to die on you. There is a fuel pump relay on the right inner fender well and it could be loose as well. But it sounds like you have intermitten fuel pressure from some source.

XJ Stryker

I very well could be sir...

My Waggie has never had a problem starting. But it used to have this problem. Sputtereing acting funny like bad fuel or TPS problems. This was all solved once i did the whole unplug and replug trick.

CPS and cause all kinds of weird problems.

jstewart1960

thanks for all the info will give to mechanic and give you update as soon as I replace neutral safety switch that is bad.

okcjeeper

I am curious when you put this new motor in was it a used motor or a remanufactured motor? Also did you have to reinstall the distributor? Reason I ask is if the distrib isn't installed correctly your timing will be off and could cause it to run weird..

BlueXJ

Who are you addressing this question to OKC????

okcjeeper

original poster of course..doh I probably should have clarified that..oops..

jeepfreak82

ever check the crank pos sensor? I have had to change mine twice (first replacement defective within month) Second was two years ago and has been fine ever since

xj4life2

I agree , I had the wires from the CPS touch the exhaust manifold and melt the insulation so everytime it would touch it again it would ground out and kill the motor or at least try to.