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GMC Forum: My 98 GMC Jimmy won't start.?
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Old 09-05-2010, 04:50 PM
Vaden Vaden is offline
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Default My 98 GMC Jimmy won't start.?

Okay, when I turn the key over it's trying to start but won't. I have' changed the computer, spark plugs and wires, distributor cap and button. And I have the check engine light P0300, maybe I didn't put the wires and plugs on tight? but I know the button is lined up right and all the wires are in the right orders. And after the new computer was put in the security system has been cleared.
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Old 09-05-2010, 06:44 PM
Molson02536 Molson02536 is offline
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Cool

Quote:
Originally Posted by Vaden View Post
Okay, when I turn the key over it's trying to start but won't. I have' changed the computer, spark plugs and wires, distributor cap and button. And I have the check engine light P0300, maybe I didn't put the wires and plugs on tight? but I know the button is lined up right and all the wires are in the right orders. And after the new computer was put in the security system has been cleared.
Check the fuse to your ECM and post back your fuel pressure reading at the shredder valve. Inspect your coil and your ICM also which would give you a no start, the other thing that would give you a no start would be a bad crank shaft sensor and cam shaft sensor.

Start with the simple and check you fuel pressure after you checked the fuses. Once that has be checked and at 100% working condition, rent a scanner to scan for nay DTC codes to indicate if there is an issue with your crank or cam shaft sensor. You can also take your ICM to Parts Sourceor Auto Zone and that can test it for you.

Good luck and keep us posted.
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