Fuel Pressure-How high
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I just went and looked on the diagram. There's a fuel pump relay that feeds power to the inertia switch, from there it goes directly to the fuel pump. No mention of an overpressure switch at all. I couldn't find any information on which slot the fuel pump relay occupies.
I would begin by testing for power at the inertia switch. If none there, it's a safe assumption that everything downstream of that is ok, and you need to pursue why there is no power.
I would begin by testing for power at the inertia switch. If none there, it's a safe assumption that everything downstream of that is ok, and you need to pursue why there is no power.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by cobaum
How do you adjust the fuel pressure up and down? I can not find anything on this in the manual.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by fixnair
That is the pressure in the filter housing. I have had to pull of the road last night to bleed the air out of the housing. Is this going to be a problem?
Have you done any fuel system mods besides the mentioned bearing? Have you opened up the fuel rails with a return system? The biggest enemy is air in the system. Then enhanced fuel pressure will really pay off as ramsmoker alluded to. Bottom line, make sure those injectors aren't firing without fuel in them.
Logistics Pro
Joined: Mar 2004
Posts: 4,221
Likes: 3
Originally Posted by teamroper98
so what would you say the optimum fuel psi is??? i have the external regualter and chipped truck,, where is a good place to start with psi and experiences,
Originally Posted by cobaum
So where does one find an external pressure regulator? Also, is there a pod mount fuel pressure guage available and where do you get it? Thanks.
Or, you can get a kit such as from http://www.itpdiesel.com.
Yes there are definitely fuel pressure gauges that can be mounted in a pod like any other gauge... Autometer, ISSPRO, etc. all make them. Try a site sponsor or ITPDiesel or http://www.dieselmanor.com
Thread Starter
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Posting Guru
Joined: Sep 2004
Posts: 1,616
Likes: 3
From: Sapulpa OK
Just to update you guys I seem to have solved the problem although I don't know what I did to repair it. I did find out that if you turn thr key on and do not start the truck within a minute or two, the computer, or something, shuts the pump off untill you rekey it. That is why I didn't have any voltage at the pump when I was troubleshooting it.
The only thing I did to repair it is I removed the fuel pressure mod. I have not had any problems since then.
I want to thank all you guys that opined on this. And Kwik, thanks for offering a wiring diag. although you probably never got my E-Mail.
The only thing I did to repair it is I removed the fuel pressure mod. I have not had any problems since then.
I want to thank all you guys that opined on this. And Kwik, thanks for offering a wiring diag. although you probably never got my E-Mail.
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