Zero fuel pressure at 4K
#1
Registered User
Thread Starter
Join Date: Jun 2002
Location: dfw texas
Posts: 1,771
Likes: 0
Received 0 Likes
on
0 Posts
Zero fuel pressure at 4K
title says it all. i can pinch off the return line and it shoots up from 40 to 60 at idle with the pulses of the lift pump. i changed the fuel filer, the screen on the heater. and i shimmed up a over flow valve so that i have 28 or so at idle. am i just at the limit of the stock fuel system? do i need to ad a aux. system? i have a dyno day saturday i was wanting to hit but the truck just doesn't run as hard as it did and it is really starting to bug me. anyone have any ideas. it has a set of dynomite diese stage 4s, lots of rack travel, 181 delivery valves, a hx40/16 on top and a bht3e on bottom with a 26cn housing on it and a 2.9 inducer on the cold side.
the truck was all but insane to drive 3 weeks ago. i would roll into it at 60 in 3rd locked up and start spining tires. all i have left to do is drop the tank and take a look at what is going on. it was running well and now it is just weak and it is driving me crazy.
the truck was all but insane to drive 3 weeks ago. i would roll into it at 60 in 3rd locked up and start spining tires. all i have left to do is drop the tank and take a look at what is going on. it was running well and now it is just weak and it is driving me crazy.
#3
Sounds like your pump might be going out. I dunno much about the 12v's. I'm fortunate enough to have a 24v that tells me when my lift pump goes out because it takes the injection pump with it. Adding an auxillary system can't hurt anything.
#5
Well... I pick up my 4090046 transfer pump replacement kit. $70 including Uncle Sam's tip... No questions asked.
I will be testing my original again when I do the oil change. This looks like a fun job, has anyone replaced the lift pump on the 01 here?
I'll do a search anyway... At first glance it looks like a knuckle buster for sure.
I will be testing my original again when I do the oil change. This looks like a fun job, has anyone replaced the lift pump on the 01 here?
I'll do a search anyway... At first glance it looks like a knuckle buster for sure.
#6
Registered
Join Date: Jul 2005
Location: Omaha, AR
Posts: 4,173
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BigBlue
I'm fortunate enough to have a 24v that tells me when my lift pump goes out because it takes the injection pump with it.
i hear that! i just went through another vp44 yesterday
Thread
Thread Starter
Forum
Replies
Last Post
JCHMOTOR
24 Valve Engine and Drivetrain
15
06-22-2004 08:25 PM