Wont start sometimes. It will crank and crank and crank but wont start. When running, jeep will shut off if I am braking and turning into a parking lot with a bump at the entrance or when I am sitting at idle for a few minutes like in traffic. Also, I replaced front pass. side ujoint and now I have bad vibrations at highway speeds and a terrible grinding noise when I hit a dip in the road and the suspension compresses. Like the jeep is bottoming out but it deffenitly isnt. Can anyone help me?

 

C101 plug in the wiring harness where it passes through the firewall. Common problem on these 87-89 Jeeps. Unplug it and clean all the connections and replug it and seal it. Will last another 20 years.

 

check fuel line pressure, injectors leaking and flooding engine or fuel filter stuck with dirt, unscrew the cap on the rail and push the nozzle, what is coming out? fuel or air? if air, switch ign. on and off several times (with little pauses between off and on) to fill rail until u hear pump turning slower, is idle stepper motor working? (at cold starts in the morning),
for the vibrations raise the jeep and turn the wheel, is it turning straight? is it hanging in the bearing? if it starts vibrating around 60mph could be the steering damper (that shock in the middle)
let me know.

 

Ok I will try these things and get back to you. Thanks