lean fuel in bank 1 put a new PCV valve on?

1999 FORD F-150
172,000 MILES • 4.2L • V6 • 2WD • AUTOMATIC
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CAM61
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The truck listed above is an XLT. Engine light came on obd code lean fuel in bank 1 put a new PCV valve on. The truck started acting rough when idling and cutoff, it would backfire and act like it wasn't getting any fuel. I have put a new fuel filter, air filter, MAF sensor and alternator (battery light wouldn't go off on dash battery wouldn't hold a charge. Battery is fine per AutoZone. Still having the same issues. Fuses and relays checked also. Any help would be appreciated. CAM
Jun 13, 2023 at 7:39 PM
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STRAILER
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It sounds like you have a weak fuel pump, here is how to check the fuel pressure so we can confirm the issue. The battery light problem you need to start a new question for because we only handle one problem per thread. Here is a guide to help you check the pressure and you can rent a fuel gauge for free or cheap from the local auto parts store.

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

Engine Running .................... 193-310 kPa (28-45 psi)
Key ON Engine OFF .................... 240-310 kPa (35-45 psi)

This guide may help as well

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Check out the images (below). Please let us know what happens.
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Jun 14, 2023 at 11:32 AM
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CAM61
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I checked the fuel pressure engine running it was 30psi. Key on Eng off I got no pressure. It sounds like the fuel pump needs to be replaced.
Jun 16, 2023 at 7:12 PM
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STRAILER
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It sounds like the fuel pump needs to be replaced.
Jun 17, 2023 at 9:47 AM
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CAM61
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Should I replace the fuel pump or fuel pump assembly?
Jun 17, 2023 at 11:57 PM
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STRAILER
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I would replace the assembly with a high-quality part.

Check this one out on Amazon:

https://amzn.to/3NzvDQ2

Please let us know how it goes.
Jun 19, 2023 at 11:07 AM
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CAM61
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I replaced the fuel pump assembly like you said and you were right. The truck is running great. Thanks so much.
Jun 23, 2023 at 4:24 AM
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STRAILER
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Thanks for letting us know, we are here to help, please use 2CarPros anytime. Can you please leave us a rating? (copy entire link)

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Thank you
Jun 23, 2023 at 10:41 AM