1998 XJ No Power at Fuel Pump

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02-23-2024, 01:09 PM

#16

Dave51

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Year: 2000

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by snagster123

How do I check this C1 A17? And for the camshaft pos sensor... is this checked at the quick disconnect?

I use push pins into connectors. Gator clips help:

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02-23-2024, 01:28 PM

#17

snagster123

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Quote:

Originally Posted by Dave51

Well that's not very good.

See if there's power coming out of the PCM C1 A17. Or if camshaft position sensor has power.

Ok.. so I pulled the plastic cover off the wires at the PCM connectors A and C.... I found the A17 (orange wire)... with the key on, multi meter showed 5.13v (set at 20v setting on the multi meter). I could not find the DB/OR wired for C1.

Last edited by snagster123; 02-24-2024 at 11:24 AM.

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02-23-2024, 01:35 PM

#18

snagster123

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Quote:

Originally Posted by Dave51

Or the throttle position sensor....

TPS is showing 5.13v

Last edited by snagster123; 02-24-2024 at 11:23 AM.

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02-24-2024, 11:25 AM

#19

snagster123

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I found out that my test lead wire to ground was not good... thus the multimeter was not reading correctly... I have now fixed my ground issue and see that there is actually just over 5v going to the sensor(s).

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02-24-2024, 11:28 AM

#20

snagster123

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with the key on, if i plug in the CPS (it was disconnected) i can hear the relay working (clicking). not sure if this is good or bad....

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02-28-2024, 02:14 PM

#21

snagster123

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Update: got her started!! yea!!! It was the fuel pump gone bad. Had to clean out the fuel tank too... so much sandy/silty stuff and chunks of debris like some plastic broken pieces. Plus, I purged the line / connection at the fuel rail, as I did not want the nasty stuff that may have been in the fuel line getting clogged up in the injectors. Good thing I did that cuz some crap came out of there too. Now running on fresh clean gas.

Also, sounds like the distributor is chirping down inside... maybe a bearing needs some grease???

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