Electrical gremlin after replacing fuel pump

[Ohit’saJeep]

So I replaced my fuel pump ( pump only ), because I was having a starting issue, but it didn’t fix the problem but was part of the problem because now I can hear the FP run. Hoping some here can help, sometimes I can turn the key on ( engine off ) and the fuel gauge doesn’t register and Jeep will not start ( has 3/4’s fuel in it ), then I can cycle the key a few times and the gauge will read and the jeep will start. Anyone ever run into this?

 

[CharlesHS]

I would recheck the fuel pump harness to make sure its fully snapped together; also ensure the electrical pins in the harness connector are not dirty. Then check the fuel pump relay in the PDC to ensure it is enabling (you will feel a click on the relay) when the ignition is turned to ON.

 

[Chris]

Have you checked the fuel pressure at the rail just to make sure it’s normal?

 

[Blondie70]

Sounds like bad ignition switch.

 

[Ohit’saJeep]

I would recheck the fuel pump harness to make sure its fully snapped together; also ensure the electrical pins in the harness connector are not dirty. Then check the fuel pump relay in the PDC to ensure it is enabling (you will feel a click on the relay) when the ignition is turned to ON.

Thanks, forgot to mention the relay was changed as well. Guess I’ll be dropping the tank again.....

 

[Ohit’saJeep]

Sounds like bad ignition switch.

I thought about that, but everything else works, voltage gauge, radio, blower motor. They all work every time I turn the key.