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89xj 4.0 auto 4wd 220,000 mi. running strong. All of a sudden I have no shift to 4th or OD?. Fluid good. trans fuse good under glove compartment. Took fuse out and manually shifted 1-2 3. Would not shift into 4th or downshift. I need help. I drive 45min. one way to work at 2400rpm. Gas is...

http://www.naxja.org/forum/showthread.php?t=939364&highlight=ignition+switch+replacement Maybe this will help.

My timing at normal idle is 11 BTDC. Is this about right?

Sorry Dennis. I have been working on this xj all day. I am dirty,cold,frustrated,and broke! Just want to correct my problem. Will you help?

I have not checked fuel pressure. Is this a must for my symptoms. I have no guage. What do I need?

Idle Stepper Motor Unplugged If I unplug mt Idle Stepper Motor also known as Idle Air Controller while my 89xj 4.0 is running what should happen? My engine continues to run perfect. Having a very had time starting when it is cold. Any suggestions?

If I unplug the Idle Stepper Motor while engine is running what should happen? When I unplugged it while the engine was running it didn't miss a beat.

89xj 4.0 auto. Just completed replacing timing chain and sprockets. Fuel pressure regulator at fuel rail. New plugs, wires, distributor cap, rotor button and CPS. Started like a new one yesterday and ran fine allday. Went out this morning and no start but would crank. After numerous tries and...

Is original radiator in my 89xj 4.0 copper inside? How can I verify? I've got a leak!

89 xj 4.0. Lined up 0 on the balancer. Checked distributor button. It is pointing about half inch past #1 post on distributor cap. Bought new chain and sprockets. Turned crank and cam and aligned marks on each. Button not pointed to #1. What has happened? Engine no start and back firing before...

89xj 4.0 auto. Cranks, has fuel at rail. What is an EASY way to test for spark? Also EASY way to test CPS. It's cold and wet this morning. Gotta go to work soon!

I have an 89 xj 4.0. I came across someone parting out a 98 grand cherokee 4.0. Will the brake booster, rear wiper motor, and rear hatch struts work on my 89xj? What else should I be interested in? Thanks Guys

HELP! Runaway Idle HELP! 89 xj. 4.0. Idle at 2400 rpm. Cleaned air module. It was very dirty. Still have high idle, higher than before cleaning. I've unpluged IAC and it made no difference in rpm. How do I determine it needs replaced? What is my next step? Please help!

My 89 xj started up this morning as usual except the idle went to 2300 rpm. I had to go to work so I took off. I drove 35 miles with 6 traffic stops along the way. No change! I turned it off and went in to work. What should I do this afternoon? I'm concerned it will blow up. NEED HELP TO GET...

Should I be hearing a loud swoosh coming from under the dash inside my 89 xj with standard power brakes.? Only when I apply my brakes!

Can anyone tell me the benefits from installing new main bearings in my 89xj with 160k miles? I've got a leaking rear seal to replace. I might do the bearing job if it's worth it.

I want to put main bearings in my 4.0 89xj. It has 160k miles. How can I determine size? Undersize, oversize, original? Bearings seem to come in sizes .040 .020 etc

What exactly is making the popping noise? I've already gone behind my work & checked bolts and axle nut.

I just replaced my left front wheel bearing hub assemby on my 89xj, 4wd, auto,select trac. The vibration & roaring is gone. Now I'm getting a popping or clicking sound when making slow turns, like parking, pulling out of the drive etc. Any one have an idea to help me diagnois and fix. Thanks

My 89 4wd xj has a worsening roaring sound in the driver side front wheel. The noise gets louder if I take a curve to the right. Tire rotation and a quick check for a loose wheel bearing didn't help. The sound simulates a tire terribly out of round. Can you folks help diagnose? Thanks!