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1997 Jeep Cherokee Randomly starts or not starts

Tiny
SONJAM
  • MEMBER
  • 1997 JEEP CHEROKEE
Electrical problem
1997 Jeep Cherokee 6 cyl Four Wheel Drive Automatic

ok, i've been trying to figure out whats wrong with my car. '97 jeep grand cherokee laredo 4x4 6 cylinder.

started out car not starting, didn't respond to jump start. Starts randomly. Decide to change the starter, its due. Starts fine, next day, no start again. So, I replace the starter relay too. Again- starts, then next day, same- starts randomly.

so, I figure it must have been the battery all along. I use my warranty and replace the battery. AGAIN, no start.

can anyone help?
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Tuesday, July 6th, 2010 AT 5:36 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What you need to do is determine if its a fuel or spark problem that's preventing it from starting-Do below.

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 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, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.
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Tuesday, July 6th, 2010 AT 6:13 PM

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