Help My Truck Died
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Mountain Pass
Joined: Jun 2007
Posts: 197
Likes: 0
From: Kansas
Help My Truck Died
Yesterday I put the FRx on. Drove the truck yesterday and today, things were fine. When I had it apart the fuel pressure regulator parts looked worn, so today I bought a rebuild kit and this afternoon I put it on. I started the truck up to check for leaks and buy the time I got around to the front of the truck it started to pull down and started knocking. By the time I ran back around to shut it off, it was knocking real bad and barely running. I shut it off. Rechecked everything, tried to start it again, it hits but doesn't run. Any idea's? 
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Mountain Pass
Joined: Jun 2007
Posts: 197
Likes: 0
From: Kansas
All the parts that I put into the FPR look good. I noticed that the new spring was about a 1/16" longer than the old one but figured that was normal for the age. It seems to be low on pressure, the pump runs for about 15-20 seconds before stopping when you turn the key on. Is it possible that the new kit, spring and FRx raised the pressure enough to kill my fuel pump that quick?
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Mountain Pass
Joined: Jun 2007
Posts: 197
Likes: 0
From: Kansas
I'll have to check it out tomorrow. I left it at work. I'll go back in the morning with a fuel pressure guage and check the pressure. I also have a new OEM pump that I'll take with me just in case. Thanks for the response. I'll let you know what I find out. I hope it's the pump. I'm just supprised it died so quick.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I'm guessing it's not your pump. They only stay on for around 25 seconds when the key is turned on if the truck is not started.
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Mountain Pass
Joined: Jun 2007
Posts: 197
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From: Kansas
When it first happened I thought it might be a plug knocked loose and checked all of them in the area. I also took the FPR apart again and checked it out. I replace the new spring with old one thinking maybe a thing with too much pressure. Even replaced the CPS just in case but still no luck. I'm just hoping its still the pump. I don't want to think of what else it could be.$$$$
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Senior User
Joined: Mar 2004
Posts: 183
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From: La Vernia, Texas
Something similiar happened to me. During my HPOP fix I decided to shim the FPR, ran fine for the test drive, let it sit overnight and the next morning it ran for about 2 minutes and died in the same manner as yours.
Replaced the pump and everything returned to normal. Originally didn't think it was the pump because I could hear it buzz but upon closer inspection found that it wasn't pumping fuel.
Replaced the pump and everything returned to normal. Originally didn't think it was the pump because I could hear it buzz but upon closer inspection found that it wasn't pumping fuel.
Thread Starter
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Mountain Pass
Joined: Jun 2007
Posts: 197
Likes: 0
From: Kansas
Well that was my problem too. I think rebuilding the FPR was too much for my pump with 200,000 plus miles. Put the new one on, works like a charm. The only problem I had was getting the inlet side of the pump un-hooked. I ended up busting it. I used a piece of 5/16 fuel line and some hose clamps to put it back together but I'm worried that the suction may collapse it. Has anyone replaced the hard plastic inlet tube with rubber fuel line and what kind hose did you use and have you had any issues? I also noticed that it starts faster now too. I had thought my HPOP was on its way out but now it's starts in half the cranking time that did.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Many folks here are running some rubber fuel line so that's no worry as long as you've got the right kind of hose. Is it properly rated, or did you just pick up some hose? Seems like 30R7 or 30R9 rated fuel injection hose is what you should be using.
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Mountain Pass
Joined: Jun 2007
Posts: 197
Likes: 0
From: Kansas
Got it at O'reilly's. It's Gate's, rated for diesel service but not for pressure, only for return. They didn't have anything else and I was in a pinch. I figured being on the suction side it would be ok. It felt stiff enough but still worry about sucking together if it starts getting really cold and pulling hard. I was going to change it out next week if I find something better.
