92 No Start Puzzler

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01-02-2011 | 05:38 PM

daf290

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Joined: Nov 2010

Posts: 4

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Model: Cherokee

92 No Start Puzzler

I have a 92 4.0 L, manual trans with 220k miles that I can't troubleshoot. It cranks fine but won't start. It has no spark and the fuel pump does not come on with the key to the on position.
It was intermittant for a time, sometimes it would start sometimes not, when it runs, it runs great. I can immediately tell when it will start as the fuel pump runs before starting.
It now does not start at all, the fuel pump does not run and there is no spark.
I have swapped fuel pump relays, can jump the fuel pump from the relay. I have replaced the fuel pump, CPS and ignition switch.
HELP!

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01-06-2011 | 11:06 AM

daf290

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Joined: Nov 2010

Posts: 4

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Model: Cherokee

Bump

Bump

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01-06-2011 | 11:08 AM

ezab

Seasoned Member

Joined: Nov 2010

Posts: 475

Likes: 2

From: Michigan

Year: 1998

Model: Cherokee

Engine: 4.0

Ignition Switch.

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01-06-2011 | 11:08 AM

ezab

Seasoned Member

Joined: Nov 2010

Posts: 475

Likes: 2

From: Michigan

Year: 1998

Model: Cherokee

Engine: 4.0

Ignition Switch. Oops didn't see that.

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01-06-2011 | 11:24 AM

cherokeefamily

Seasoned Member

Joined: Mar 2008

Posts: 349

Likes: 1

From: Mentor, OH

Year: 2000

Model: Cherokee

Engine: IL6 4.0

A bad ballast resistor can cause a "crank and no start" condition. I always carried a spare in the glovebox of my '92 XJ. It should be located on the driver's side inner fender.

Last edited by cherokeefamily; 01-06-2011 at 12:42 PM.