97 Won’t start after impact - JeepForum.com
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post #1 of 8 Old 05-09-2021, 10:59 AM Thread Starter
Pauldixon
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1935 CJ2A 
 
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97 Won’t start after impact

Hi, my 97 4.0L hit a brick wall backing up. It won’t start now. Cranks fine but no fuel at the shraeder valve on the fuel fuel rail. Tested my ASD relay as well as swapped it and it was fine as far as I could tell (didn’t put power to it). Checked fuel pump connector and the red locking tab was hanging out but I think it’s fine as I can’t separate the connectors - they seem locked together. What should I do next?

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post #2 of 8 Old 05-09-2021, 03:49 PM
bobjp
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Can you hear the pump turning on?

Did you check the fuel pump relay and fuse?

97 TJ sport.
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post #3 of 8 Old 05-09-2021, 03:54 PM
bobjp
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Can you hear the pump turning on? Did you check the fuel pump relay and fuse? You can swap relays or feel it click.

If the pump isn't turning on, measure for 12 volts at the fuse, relay output, and at the plug by the tank.

97 TJ sport.
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post #4 of 8 Old 05-09-2021, 07:16 PM Thread Starter
Pauldixon
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I’ve checked all the fuses - they are good. I swapped the fuel relay with the horn relay and no changed. Good thought on power - I’ll check the fuel fuse and see if it gets power when the key turns on and the I can check the connector at the back if I can get it apart!
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post #5 of 8 Old 05-13-2021, 08:15 AM Thread Starter
Pauldixon
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Ok - latest update. Checked the fuse - good and 12V at fuse. Checked relay and 12V there. Took the tires off and got my head right near the fuel pump and I can hear it turn on when the key turns on. Put 10L of gas in the tank just to make sure (gauge reads over 1/4 tank) and still no fuel at the fuel rail. Seems like something happened to my pump internally. Thinking now of replacing the whole pump assembly. Thoughts?
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post #6 of 8 Old 05-13-2021, 12:53 PM
Jonny Jeep
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There's a plastic tube on the pump assembly that can break if the tank gets hit and the assembly shifts. I expect you'll find it's broken if you can hear the pump running. I replaced my assembly after my pump failed a couple of years ago with an AC Delco assembly from rockauto. If you have a 15 gallon tank you could get the 19 gallon assembly and do the 15 to 19 gallon tank mod.
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post #7 of 8 Old 05-13-2021, 03:17 PM
bobjp
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Not a bad idea to replace the pump. Bosch is OEM and well regarded, but you can only buy the pump, not the assembly.

If I were you, I would pull the tank and find out what broke first.

97 TJ sport.
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post #8 of 8 Old 05-17-2021, 07:42 AM Thread Starter
Pauldixon
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Just to close the loop on this. Bought a new pump assembly and removed the tank and took out the pump. The plastic line coming from the pump to the regulator had snapped. Hence it was pumping but just into the tank. Replaced the pump and she fired right up!


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