Please Help! 40PSI and steady after brand new Walbro 340
08-10-2004, 11:51 AM
#1
TECH Enthusiast
Thread Starter
iTrader: (3)
Join Date: Nov 2001
Location: Alexandria, VA
Posts: 568
Likes: 0
Received 0 Likes
on
0 Posts
Please Help! 40PSI and steady after brand new Walbro 340 Ok, I was having pressure problems with the fuel, so I replaced my Walbro with a new 340. Before upon priming the fuel pump, the pressure would jump to 40 and then leak down to practically nothing. Now it jumps to 40 and holds through idle. I am under the impression that 58psi is normal. Air Fuel seems alright even at this pressure, however isnt it just unsafe to run this low on a H/C full bolton car? What is toast? FPR?
Sean
Sean
08-10-2004, 08:41 PM
#5
TECH Enthusiast
Thread Starter
iTrader: (3)
Join Date: Nov 2001
Location: Alexandria, VA
Posts: 568
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Classic
Are you running a stock setup except for the pump? I'm guessing you are not using an adjustable regulator?
Stock except for the intank yes.
Sean
08-11-2004, 06:02 AM
#6
On The Tree
Join Date: Jul 2004
Posts: 161
Likes: 0
Received 0 Likes
on
0 Posts
Could be the stock FPR, if its still on there.
FWIW I don't think the stock FPR would hold for long with a aftermarket pump (i.e. high pressure - high volume). I replaced mine with an aftermarket FPR and removed the stocker. No problems as of yet.
FWIW I don't think the stock FPR would hold for long with a aftermarket pump (i.e. high pressure - high volume). I replaced mine with an aftermarket FPR and removed the stocker. No problems as of yet.
08-11-2004, 06:13 AM
#7
TECH Fanatic
iTrader: (3)
Join Date: Sep 2002
Location: NC
Posts: 1,943
Likes: 0
Received 0 Likes
on
0 Posts
I agree -- that little tiny stocker is pathetic. Might look at upgrading the rest of the fuel system, lines etc. Its expensive but do it right the first time and you'l never have to do it again.
Trending Topics
08-11-2004, 07:45 AM
#8
TECH Enthusiast
Thread Starter
iTrader: (3)
Join Date: Nov 2001
Location: Alexandria, VA
Posts: 568
Likes: 0
Received 0 Likes
on
0 Posts
Ok, Ill go for it. What kinda after market FPR should I look into, and where the hell is the stock one anyways. I thought it was the little thing at the top underside of the fuel pump assembly. Anybody got a pic for me and what lines I need to modify or connect to it. Im dumb when it comes to fuel lol, never had to deal with it before. 
08-11-2004, 08:27 AM
#9
TECH Fanatic
Join Date: Dec 2001
Location: Germantown, MD
Posts: 1,220
Likes: 0
Received 0 Likes
on
0 Posts
Please tell me you cut the hole? 
If you didn't I don't envy you. But I would also check the voltage your pump is getting. Check for debris around the inlet sock of the pump and the FPR.
Mike
If you didn't I don't envy you. But I would also check the voltage your pump is getting. Check for debris around the inlet sock of the pump and the FPR.Mike
08-11-2004, 10:05 AM
#10
TECH Enthusiast
Thread Starter
iTrader: (3)
Join Date: Nov 2001
Location: Alexandria, VA
Posts: 568
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by buschman
Please tell me you cut the hole? If you didn't I don't envy you. But I would also check the voltage your pump is getting. Check for debris around the inlet sock of the pump and the FPR.
Mike
If you didn't I don't envy you. But I would also check the voltage your pump is getting. Check for debris around the inlet sock of the pump and the FPR.Mike
Voltage looks normal, and I just changed the sock with the pump. I still need a description of the FPR, I think I am seeing it but just need verification. Right under where the fuel lines hook up to the pump assembly? And bottom line.... 40psi and rock steady, driving it from point A to point B... bad for the engine?
08-12-2004, 07:20 AM
#11
just driving...no problem....don't WOT it tho. Yeah it's the little round thing under the fuel pump assembly "top" held on by a little spring clip. Make sure the supply hose right off the pump is not split.....I have never heard of the stock regulator going bad like that especially when it was just working before you put in the pump.
08-12-2004, 11:47 AM
#12
TECH Enthusiast
Thread Starter
iTrader: (3)
Join Date: Nov 2001
Location: Alexandria, VA
Posts: 568
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by cablebandit
just driving...no problem....don't WOT it tho. Yeah it's the little round thing under the fuel pump assembly "top" held on by a little spring clip. Make sure the supply hose right off the pump is not split.....I have never heard of the stock regulator going bad like that especially when it was just working before you put in the pump.
Anyway I can pick up a stocker and fix it fast? I was getting a constant 60psi when it was working correctly. Dont really feel like going aftermarket right now as I would have to run new lines etc.
Thanks
Sean
08-31-2004, 09:28 AM
#14
TECH Fanatic
iTrader: (6)
Join Date: Jan 2002
Location: Springfield, IL
Posts: 1,194
Likes: 0
Received 0 Likes
on
0 Posts
Tell Jack @ Ractronix to get crackin and you can give him your money. 
http://www.racetronix.com/Racetronix-FLS1-Reg.html
If his isn't ready yet, I found a couple different varieties when I was looking for one, with a returnless FPR that went in place of your factory T-fitting between the fuel filter and the gas tank. I did a little googling for them, but couldn't find you any links.
http://www.racetronix.com/Racetronix-FLS1-Reg.html
If his isn't ready yet, I found a couple different varieties when I was looking for one, with a returnless FPR that went in place of your factory T-fitting between the fuel filter and the gas tank. I did a little googling for them, but couldn't find you any links.
08-31-2004, 11:49 AM
#15
8 Second Club
iTrader: (1)
Join Date: Nov 2001
Location: the not so stock tribe
Posts: 3,697
Likes: 0
Received 0 Likes
on
0 Posts
i got one of those "T" regulators for sale if you are interested.
you can increase pressure as much as you want with those, but if you want to go lower they will only go as low as the intank one does ( assuming you keep the stock fpr in there)
you can increase pressure as much as you want with those, but if you want to go lower they will only go as low as the intank one does ( assuming you keep the stock fpr in there)
