1989 Jeep Cherokee Won't Fire

SHEPPY4537

MEMBER
1989 JEEP CHEROKEE
6 CYL
4WD
AUTOMATIC
150,000 MILES

I went offroading the other day and stopped to get some fuel. i pulled onto the road afterward and my truck stalled then wouldn't fire. I even tried pouring a little fuel down it's throat and it still wouldn't fire. Since then i've replaced the ignition module and coil, the crank sensor and checked all the fuses and relays and she still won't fire. Would you have any suggestions besides blowing it up?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

If the engine's condition is in tip top shape-do below to determine if its fuel or spark problem that's if its cranking over and refuses to start

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil, distributor pick-up coil, ignition control module, cam and crank sensors-

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time