Results 1 to 7 of 7

Thread: fuel pressure problem

  1. #1
    Junior Member JOURNEYMAN
    Join Date
    Nov 2006
    Location
    san antonio,texas
    Posts
    28

    fuel pressure problem

    i run an A2000 aeromotive pump with an a4 regulator i run the bypass off the pump and never had a problem. i run 12 pounds pressure at the pump and 8 pounds at the regulator
    Now for some reason i am losing all fuel pressure. it will drop down to zero ,but the carbuator does not lean out.i tried turning the pressure up at the pump ut did not seem to help
    I am running out of ideas real fast---- any ideas ???

  2. #2
    Senior Member MASTER BUILDER
    Join Date
    Nov 2007
    Location
    Wisconsin cheesehead!!
    Posts
    213
    did you try a differant guage?
    1987 Pontiac Fiero GT
    418ci SBC v8, manual 5-speed.
    dual stage nitrous injected

  3. #3
    Junior Member JOURNEYMAN
    Join Date
    Nov 2006
    Location
    san antonio,texas
    Posts
    28
    i use an innovate datalogger
    pressure holds constance at 8 lbs until i release the transbrake and the pressure drops and goes back to 8 lbs when i let up on it

  4. #4
    Senior Member RACING JUNKIE curtisreed's Avatar
    Join Date
    Feb 2004
    Location
    KIEFER, OK.
    Posts
    1,309
    Nova,
    I don't have an answer as to why you are having your problem but it sounds like you are stalling the fuel in the lines. The bypass could have a problem when you take of there is a spike in fuel flow resistance and it sounds like the pump is giving up at that point. I would call aeromotive and see what they suggest or pull the pump apart yourself and look things over.

    One thing I just thought of though you said the pressure on your data logger shows zero until you let up on the throttle, is that at the end of the pass and the carb did not run out of fuel? If so it might be a sensor problem. Just some thoughts.

    Curtis

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
    Posts
    2,998
    Quote Originally Posted by v8Fiero
    did you try a differant guage?
    This would be my guess also I've seen liquid filled gauges mess up from motor heat.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  6. #6
    Senior Member MASTER BUILDER
    Join Date
    Dec 2003
    Posts
    185
    Take your bypass regulator off and apart and clean it well. I have seen them get gummed up and malfunction. May not be the problem but worth looking at!!!

    As for the fuel pressure drop at release of the brake, That's normal ans it should come back up..

    On another note 8 fuel psi is more than enough at the regulator IMO 8)

  7. #7
    Junior Member JOURNEYMAN
    Join Date
    Nov 2006
    Location
    san antonio,texas
    Posts
    28
    i am going to talk to aeromotive about the pump and talk to Innovate about the sensor--- thanks for all your response
    i will let you know the results-- thanks again


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy