1998 Jeep Laredo Starting Engine

CLRGOLD

MEMBER
1998 JEEP GRAND CHEROKEE LAREDO
6 CYL
4WD
AUTOMATIC
190,000 MILES

I have a 1998 Jeep Grand Cherokee, 6 cyl, 4.0L, fuel injected. I'm unable to start the engine. When key is in ON position, all lights (engine check stuff) on the dash lightup as normal, but no gauges move. When I put key into start position, the engine cranks over as normal, but does not start. It does not even attempt it. I suspect spark or fuel electrical. I've checked fuses in the engine compartment, all fine. The vehicle ran fine this morning to work and now I'm stuck at work. Where else can I look for in the jeep? What else could be the porblem? Thank You!

Tuesday, January 19th, 2010 AT 3:33 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Cranks but no start condition:

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/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 packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.

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/broken or jumped timing
belt/chain.

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Tuesday, January 19th, 2010 AT 3:49 PM