grub90xj

My girlfriends jeep is running really rough.
Its a 95 xj 2door 5spd 4.0
The other day it started shaking bad and it souds like a Subaru. It putters and shakes. Very bad.any help appreciated

Brown Dog

Difficult to tell from your very brief description. Does it backfire, too? Exhaust smoke? What RPM? What errors show when you run diagnostics?

FYI - We just ran Sea Foam through our 2.5L because it had a sticky lifter. (Your description sounds like lots more than a stick lifter!) Lots of smoke during while cleaning the system during the procedure. Runs great now.

PocketsEmpty

When was the last routine maintence done? Spark plugs, wires, air filter, distributor cap & rotor? Have you done any troubleshooting? The first step...pop the hood. Look for any loose hoses or connections. It sounds like a vacuum leak could be a possibility.

grub90xj

Tune done less than a year ago,and there are novacum leaks ive checked.im thinking it is a plug or plug wire bad

grub90xj

No. Smoke the jeep can be driven still just shakes like crazy and sounds like a subaru

OttawaXJ

shakes like crazy?

Open the hood, pull the plug wires off the plugs one at a time and see if it changes. If it starts to bog down, means that particular plug is working correctly, if you get to one where you pull it and nothing changes it means either that wire or the plug is bad. Or possibly the injector in that cyl.

I just had to do the same thing in my DD, 5 minutes and I knew I needed a new coilpack and which one was bad.

PocketsEmpty

His 95 won't require any coil packs. But, this is a good method of testing for a dead cylinder.

OttawaXJ

I realize that, its the method for checking dead plugs, injector, wire, or coil packs if its equipped with them.

It'll be a distributor with a 95 if I recall and in this case using that method it'll tell him if hes got a dead spark plug, injector or wire.

grub90xj

Fixed it the other day had a bad plu,replaced them all and new wires