Go Back  Offshoreonly.com > Technical > General Q & A
fuel pressure issues - pulling my hair out!! >

fuel pressure issues - pulling my hair out!!

Notices

fuel pressure issues - pulling my hair out!!

Thread Tools
 
Old 07-05-2011, 07:44 AM
  #21  
Registered
 
Join Date: Nov 2005
Location: Fredericksburg, Va
Posts: 4,554
Likes: 0
Received 2 Likes on 2 Posts
Default

the pickup tube presses in the bottom of the fitting, seen them plastic and aluminum..some have a small filter on the end..that could be the issure right there...
ezstriper is offline  
Old 07-05-2011, 09:43 AM
  #22  
Registered
Thread Starter
 
Join Date: Oct 2009
Posts: 55
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by ezstriper
the pickup tube presses in the bottom of the fitting, seen them plastic and aluminum..some have a small filter on the end..that could be the issure right there...
if i unscrew the 90* fitting from the tank, will the pickup tube come out with it? if not, how do i get it out? will i have to take the sending unit out or something in order to get to the tube?
hondahp4 is offline  
Old 07-05-2011, 09:40 PM
  #23  
Registered
 
Join Date: Apr 2005
Location: Washington, MO
Posts: 1,442
Received 19 Likes on 7 Posts
Default

Originally Posted by hondahp4
if i unscrew the 90* fitting from the tank, will the pickup tube come out with it? if not, how do i get it out? will i have to take the sending unit out or something in order to get to the tube?
The pickup tube should come out with the 90° fitting. I had a problem with my '06 292 fuel tank pickups. The pickup tube was hard plastic with a press fit over a barb fitting on the bottom of the 90° fitting. I believe ethanol in todays gas over time caused the plastic to swell slightly. This allowed air to be sucked in the gas line (especially with low fuel levels) and cavitate my fuel pump. Ended up getting new pickups with welded stainless pickup tubes from the gas tank manufacturer. Problem solved. Good luck!
4mulafastech is offline  
Old 07-06-2011, 04:21 PM
  #24  
Registered
 
Join Date: Nov 2005
Location: Fredericksburg, Va
Posts: 4,554
Likes: 0
Received 2 Likes on 2 Posts
Default

if you take the fitting out and tube does not come out you have found the problem...but would not run at all...
ezstriper is offline  
Old 06-03-2012, 04:06 PM
  #25  
Registered
Thread Starter
 
Join Date: Oct 2009
Posts: 55
Likes: 0
Received 0 Likes on 0 Posts
Default

ok guys, this boat is going to be the death of me......pulled the boat out this weekend (i know, June and my boat hasn't been dewinterized yet....shame) and have the exact same problem i had last year....again, no fuel pressure!!! this time while cranking my fuel pressure gauge says 5psi. as soon as the engine starts, it drops to 0.5 at idle and 0 at anything off idle. did the exact same troubleshooting as last year including putting the pickup in a gas can to rule out that again. if i pull the carb feed line off and crank it seems to be pumping fine and filled a 20oz bottle in around 6 pumps, but must be losing pressure once the carb starts feeding off it. i was thinking the fuel pump again (maybe the diaphragm has a pinhole), but there is no fuel coming out of the bleed line that goes to the carb. i'm yet again stumped by this fuel system....
hondahp4 is offline  
Old 06-03-2012, 04:31 PM
  #26  
Registered
 
Join Date: Aug 2011
Location: near Rochester, NY
Posts: 27
Likes: 0
Received 0 Likes on 0 Posts
Default

Try checking for leaks in your fuel lines between the tank and the pump.

Last edited by drozz30; 06-03-2012 at 04:35 PM.
drozz30 is offline  
Old 06-03-2012, 05:12 PM
  #27  
Registered
Thread Starter
 
Join Date: Oct 2009
Posts: 55
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by drozz30
Try checking for leaks in your fuel lines between the tank and the pump.
i have replaced the line from the tank to the pump, which would be suction side of the pump. that would be the only one that would draw air. if anything else was leaking, then it would be on the pressure side of the pump and would leak rather than draw air. it would have to be a pretty hefty hole to bleed 5-7psi of fuel pressure to zero and i would notice fuel leaking. the odd part is that it builds pressure when the engine is cranking but not running (pulled coil wire to distributor), but loses it when the engine starts.

the fuel pump is less than a year old, so i wouldn't think it would be bad, but its the thing i'm aiming at right now. i warrantied the old one the other day, so i'm waiting on a new one to come in later this week to rule it out.

Last edited by hondahp4; 06-03-2012 at 05:20 PM.
hondahp4 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.