No fuel pressure

1996 JEEP CHEROKEE

200,000 MILES • 5.2L • V8 • 4WD • AUTOMATIC

KEVIN KOEHLER

MEMBER
1 POST

I don't get any fuel pressure. I changed the relay, and pump. I checked for clogs.
I am wondering if it is the security, and it is in the "no-run" mode.
I read in another article that the security system can be over ridden. But you couldn't say the process on line.

Sep 19, 2020 at 10:03 AM

KASEKENNY

✓Experienced Mechanic
18,907 POSTS

Does the security light stay on? If not, then I don't think we have a security issue. Have you checked fuel pressure and if so what is the PSI? Also, confirm a fuel issue by using starting fluid in the intake and see if it fires.

Clearly it appears you are sure this is a fuel issue but we just need to double check.

As for overriding the security system, you can just do an internet search for PCM's that delete this system. I have not had success with these so I would not recommend it but others say they work.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let us know this info and we can go from there. Thanks

Sep 19, 2020 at 11:34 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,248 POSTS

Hi,

The reason they can't say it online is due to liability issues.

Have you checked the automatic shut down relay? It is near the fuel pump relay? (see pic 1)

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Also, Check the fuses in pic 2 and the ground in pic 3.

Let me know.
Joe

Images (Click to enlarge)

Sep 19, 2020 at 11:39 AM

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No fuel pressure

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