Fuel Pressure HELP
Thread Starter
|
Senior User
Joined: Nov 2010
Posts: 246
Likes: 0
From: Boiling Springs, PA
Fuel Pressure HELP
I just installed the blue spring upgrade for the regulator and had quite a time breaking stuff. I had to replace the housing for the fuel filter/oil filter. I have the 6.0 with the following upgrades:
EGR Delete
New Oil Cooler
ARP Head Studs
4" MBRP Turbo Back Exhaust
Gauges: EOT,ECT,FP,EGT
Upgraded STC Fitting
SCT X3 w/ custom tunes from Matt at Innovative Diesel
My question is this: My fuel pressure is perfectly normal at normal driving and at idle. When I give WOT the fuel pressure diminishes to below 40psi. I obviously do not keep it at that for sake of my injectors. I know in order to keep the tune on I apparently have to get an aftermarket fuel pump such as FASS or Airdog. I was looking at the Airdog website and saw a Raptor. Can anyone explain what this is and if it will solve my problem. I am not planning on anymore upgrades, I have enough power as it is. Any help would be appreciated.
Thanks.
EGR Delete
New Oil Cooler
ARP Head Studs
4" MBRP Turbo Back Exhaust
Gauges: EOT,ECT,FP,EGT
Upgraded STC Fitting
SCT X3 w/ custom tunes from Matt at Innovative Diesel
My question is this: My fuel pressure is perfectly normal at normal driving and at idle. When I give WOT the fuel pressure diminishes to below 40psi. I obviously do not keep it at that for sake of my injectors. I know in order to keep the tune on I apparently have to get an aftermarket fuel pump such as FASS or Airdog. I was looking at the Airdog website and saw a Raptor. Can anyone explain what this is and if it will solve my problem. I am not planning on anymore upgrades, I have enough power as it is. Any help would be appreciated.
Thanks.
Fleet Owner
Joined: Nov 2003
Posts: 27,927
Likes: 3,651
Did you leave the twisted fuel line in place (or am I mixed up on the thread)? Although, if it were the return fuel line, I don't see how it could make a difference in lowering the supply pressure ......
Pretty much must be either a weak pump or a restriction issue.
Pretty much must be either a weak pump or a restriction issue.
Thread Starter
|
Senior User
Joined: Nov 2010
Posts: 246
Likes: 0
From: Boiling Springs, PA
I am not sure what you mean by the twisted fuel line? Are you talking about my previous post? If so, yes I did. It was not twisted, just barely kinked. As far as the blue spring upgrade, wouldn't it have a problem keeping up the PSI at WOT since I am running the extreme street tune?
Fleet Owner
Joined: Nov 2003
Posts: 27,927
Likes: 3,651
I will have to defer to others on the fuel w/ an extreme tune. My mild tune has created no issues, but I can see it happening w/ an extreme tune.
One of these days, I would like to install a fuel sump at the tank and an Airdog though!
One of these days, I would like to install a fuel sump at the tank and an Airdog though!
Trending Topics
Thread Starter
|
Senior User
Joined: Nov 2010
Posts: 246
Likes: 0
From: Boiling Springs, PA
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread Starter
|
Senior User
Joined: Nov 2010
Posts: 246
Likes: 0
From: Boiling Springs, PA
I pm'd npccpartsman and he explained that just because I raised the fuel pressure with the blue spring does not mean the pump can keep up with the volume required by certain tunes. I guess I'm going to have to get a pump if I want to keep the tune. Thanks guys!
Junior User
Joined: Nov 2011
Posts: 95
Likes: 0
From: SE Louisiana
I would look for a restriction issue between pump & tank before buying a pump, a hi-perf pump is worthless if it can't get the fuel from the tank.
Junior User
Joined: Nov 2011
Posts: 95
Likes: 0
From: SE Louisiana
1 of my service trucks a 90 7.3 would run great then shut down on the road like it was turned off, come to a stop & start right up, only happen on front tank, so dropped tank & found pickup screen broke, plastic floating around, ton-o-crap in bottom of tank & rust globs in pickup tube, I figured it was getting plastic sucked on pickup, which came off when engine stopped.
Fuel comes with lots of other crap in it!!
Thread Starter
|
Senior User
Joined: Nov 2010
Posts: 246
Likes: 0
From: Boiling Springs, PA
Thanks I guess I'll start poking around. Any advice on testing my block heater? It doesn't seem to be working. I cleaned off the plug and verified the receptacle isn't tripping any breakers. Is there a way to test?
Thread
Thread Starter
Forum
Replies
Last Post
wayfastwhitey
1999 - 2003 7.3L Power Stroke Diesel
19
Dec 13, 2005 04:21 PM