LML-0087&CHANGE FUEL FILTER MESSAGE

[Jfree]

Deleted, efi live, fass lift pump!!
Every start up change fuel filter message appears and once driving normal or hard 0087 code. I’ve replaced filters, water in fuel sensor, service fuel filter sensor/switch, fuel pressure sensor, fuel pressure relief. No metal in tank or filter during fass install last week. Didnt cure code or message. Truck runs great all the time!!Stumped!!

 

[ikeG]

Watch actual vs desired fuel rail pressure on a scantool while getting it to set p0087. If it's low you may be catching a failing cp4 before it grenades. Did you replace the entire fuel filter head?

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[gmac32]

Fuel pressure regulator 2 may be bad or your regulated return line may be bad