code proo88

[rrvallair]

Need help iam haveing fuel problems with my 6.4 the code says pressure in the fuel rail to high or fuel pressure too high. i only got the worst problem when the fuel tank is full but when it down to half or quarter of a tank truck runs good, replaced low pressure fuel pump and also checked tank this month no restrictions in the tank. the ford tech say it could be the high pressure fuel pump but that also was changed out in 08/2008at 68000 miles my truck now has 148000. it is a work truck all highway miles between texas and louisiana. please help if you can anybody

[blacksnapon]

If you are talking about p0088 (fuel rail/system pressure-too high), This error will be set if the fuel pressure in the rail is too high, and the controller cannot regulate it to the setpoint. Look at the low pressure system, wiring to the vcv and pcv, frp sensor, and the pump.

[blacksnapon]

[todoslarry]

I've been fighting this for 3 months now and fixed it!
1. Remove the EBP sensor cap and clean out carbon buildup with a paperclip, yes a paperclip. Your gas mileage will also improve. Youtube video at
www.powerstrokehelp.com then to 6.4 videos
2. Go to the dealer and ask them to re-map or calibrate your computer, takes maybe 15-20 min. there are updates form Ford and no one else has them sadly. my dealer here in Cabo did it for free.
3. The sensor wasn't stuck in the open or closed position as 2 of the possible fixes
4. I'm replacing my sensor in 2 weeks to eliminate more buildup its only $42

Originally Posted by rrvallair

Need help iam haveing fuel problems with my 6.4 the code says pressure in the fuel rail to high or fuel pressure too high. i only got the worst problem when the fuel tank is full but when it down to half or quarter of a tank truck runs good, replaced low pressure fuel pump and also checked tank this month no restrictions in the tank. the ford tech say it could be the high pressure fuel pump but that also was changed out in 08/2008at 68000 miles my truck now has 148000. it is a work truck all highway miles between texas and louisiana. please help if you can anybody