Threw P088 code- needs new HPFP - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 06-29-2014, 11:03 AM Thread Starter
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Threw P088 code- needs new HPFP

I have an 09 SRW CC lariat. I was towing an 11000lb fifth wheel through North Carolina. DPF was deleted and I was running the gearbox z dpf r economy tune. Everything was going well until I went to accellerate to pass a very slow moving vehicle. All of a sudden, truck de-fueled, and I could not make over 20lbs boost. For the next few hours, the problem kept re occurring. No CEL. Limped truck and camper to campground in Virginia. Once I was set up, took unloaded truck for a ride. All seemed ok. I thought it was weird, but maybe something was wrong with the computer and it had reset itself when I restarted the truck.
Next morning, took family out and about 15 minutes into trip, same symptoms. No power, boost limited to 20psi, and de fueling. Took family to campground and went in search of Ford dealer to help. While enroute, finally a CEL. I thought that at least I could find out what the problem was. First two ford dealers told me there was nothing they could do, even though I was now stranded hundreds of miles from home. Third dealer I tried got me in. Code was p088. Fuel pressure too high. Dealer confirmed that HPFP had gone bad and found metal shavings in fuel filter. Luckily, nothing else was found to be wrong. Cab off job in progress, hopefully will have truck back by Monday. $2500 to fix. I am just three months out of warranty. Not sure if the cause was bad diesel or not, hopefully I will find out. Dealer I ended up at was very accommodating and the tech that was working on my truck said he has done quite a few of these, he said I caught it early before any injectors went bad.
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post #2 of 5 Old 06-30-2014, 07:22 PM Thread Starter
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Ok. Picked up truck from the dealer. They replaced hpfp...$3600 repair. They said that there was an exhaust leak that they could not find. I reminded them that I had deleted the dpf and asked if the leak sounded like a hairdryer. The service rep said yes, and that there was no performance loss. Since I had to vacate the campground, I went ahead and picked up the truck.
There is a high pitched whistle which gets worse as the turbos spool up. At idle and less than 10 psi, there is no noise. Once I hit 20 psi and above, especially while towing, the high pitched whistle is very loud. I am thinking that an up pipe may be cracked... the sound is coming from right behind the dash, where the turbos are. I am going to crawl under the truck tomorrow to check the up pipes for soot. Does anyone else have any ideas whzt could be causing this whistle? Thanks!
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post #3 of 5 Old 07-01-2014, 07:21 AM
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I bet the whistle is either a broken exhaust manifold bolt or a cracked/leaking up pipe.

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post #4 of 5 Old 07-01-2014, 07:38 AM Thread Starter
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Thanks. I figured that when they pulled the cab they might have broken one of those up pipes. How bad of a job is it to replace the manifold bolts if that is the cause?
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post #5 of 5 Old 07-01-2014, 07:49 AM
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Quote:
Originally Posted by jab108 View Post
Thanks. I figured that when they pulled the cab they might have broken one of those up pipes. How bad of a job is it to replace the manifold bolts if that is the cause?
Yea its very possible they did. Its kind of a pain in the butt. You can get them off with the cab down but I have heard its no fun. Then you have to get the broken bolt out. Usually exhaust manifolds are a cab off job. When I put on the 6.0 manifolds I had a broken bolt also.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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