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post #1 of 5 Old 10-10-2013, 09:43 AM Thread Starter
RL-139
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1996 XJ Cherokee 
 
Join Date: Mar 2009
Location: Rhode Island
Posts: 20
Starting Issue

I know there are a million threads on xj starting issuesbut i cant seem to find one relating to my issue.

So i went to go to work yesterday morning & she wouldnt start, I went through all the standards, Air was ok, I had spark which leaves fuel so i hit it with some sarting fluid & she fired up & died right out. Later in the evening I had my wife ohp in shut the door & turn the key on while i listned for the fuel pump & nothing.

The temp didnt drop below 50 over wednesday night.
This morning I went & picked up my multi-meter & new fuel pump, When I got back for ****s & giggles I gave it another shot & she fired right up several times & I can hear the pump kick on.

Any Thoughts?


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post #2 of 5 Old 10-10-2013, 11:47 AM
tjwalker
It's the crank sensor!
 
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1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,749
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There is a "relay" for the fuel pump in the power distribution center, the black box under the hood on the passenger side.

Before you install that new fuel pump, you might try swapping the fuel pump relay with a non-critical relay and see if that resolves it. These relays are all the same part number so no issue with swapping.

If a relay swap takes care of your problem, then replace the suspect relay.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
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post #3 of 5 Old 10-10-2013, 01:20 PM Thread Starter
RL-139
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1996 XJ Cherokee 
 
Join Date: Mar 2009
Location: Rhode Island
Posts: 20
Quote:
Originally Posted by tjwalker View Post
There is a "relay" for the fuel pump in the power distribution center, the black box under the hood on the passenger side.

Before you install that new fuel pump, you might try swapping the fuel pump relay with a non-critical relay and see if that resolves it. These relays are all the same part number so no issue with swapping.

If a relay swap takes care of your problem, then replace the suspect relay.
That was one of the first things i tried.
this just doesnt make sence to me

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post #4 of 5 Old 10-10-2013, 01:27 PM
MrB
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2006 TJ Wrangler 
 
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Location: Hagerstown
Posts: 176
A fuel pump can go bad intermittently. If you were turning the key and not hearing the fuel pump it was either in a deadspot as far as the fuel pump motor is concerned or it wasn't getting power. If you tried swapping the relay and nothing happened I'd be looking at the fuel pump.
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post #5 of 5 Old 10-10-2013, 05:41 PM
tjwalker
It's the crank sensor!
 
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1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,749
Garage
Quote:
Originally Posted by RL-139 View Post
That was one of the first things i tried.
this just doesnt make sence to me
You should post everything you have tried; failure to do so makes for going "the long way around".....

Replace your fuel pump assembly if all wiring checks out with a thorough inspection.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
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