Home 
Home Search search Menu menu Not logged in - Login | Register
> Jensen Healey & Jensen GT Tech > Fuel Stuff > Fuel pump check valve

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
Fuel pump check valve  Rate Topic 
AuthorPost
 Posted: 08-10-2008 09:54 pm
  PM Quote Reply
1st Post
dwalls1
Member
 

Joined: 04-11-2008
Location: Bloomfield, New Mexico USA
Posts: 207
Status: 
Offline
I've noticed that my fuel pump doesn't seem to stay primed. It makes a lot of noise until it loads and then quiets. After being parked for a week on a slope it didn't want to pump until I disconnected the fuel line from the T. This appears to only be when the fuel tank is below 1/4. Is there a check valve I should put before the pump? Is the pump fixing to take a dump? Should I take out a second mortgage and fill the tank? 

Back To Top PM Quote Reply  

 Posted: 08-13-2008 06:17 pm
  PM Quote Reply
2nd Post
Greg Fletcher
Administrator


Joined: 03-11-2005
Location: Lake Nacimiento, California USA
Posts: 430
Status: 
Offline
The glorious, original SU fuel pump is a wonder of mechanical engineering. It will work fine with any amount of fuel in the tank, other than none. It will pump up to operating pressure every time you start the car since it is not advisable to keep the fuel system pressurized full time. You didn't say if you are using the SU or some other, lowly, after market version. On the SU, there is technically a built in "check valve", but I would guess that a fault would be more likely to be found in the vacuum valve from what you mentioned. The old pumps can be rebuilt to fix any problem.

Back To Top PM Quote Reply

 Posted: 08-14-2008 04:43 am
  PM Quote Reply
3rd Post
dwalls1
Member
 

Joined: 04-11-2008
Location: Bloomfield, New Mexico USA
Posts: 207
Status: 
Offline
Thanks for the reply Greg! I have the small square pump like Delta sells for $45 only I paid more than 3 times that out in El Cahone. It is mounted rather high on the LR wheelwell, maybe a lower mounting would help. It was only the one time that it has given trouble and that was only after sitting for over a week with the car high in front on ramps, and the tank low. It still gave me pause, though. You have thrown me a curve with mention of a vacuum valve , however. Could you expand on that for me? I was in town this morning and thought the pump wasn't working on start up because I couldn't hear it and and the park brake light wasn't on. I popped the hood to check my fuse box fix and realised that the brake light was off because the park brake was off. so I opened the trunk with my new remote release cable and stuck my head in to hear the pump going merrily along. I worry when I hear it and I worry when I don't. Well , thanks again and take care. Dale 

 

Back To Top PM Quote Reply  

Current time is 06:12 pm  
> Jensen Healey & Jensen GT Tech > Fuel Stuff > Fuel pump check valve Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems