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    Author Topic: fuel pressure drop off  (Read 904 times)

    Offline cudaaah

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    • 71 HEMI cuda, 2015 ram 2500 mega cab diesal 4x4
    fuel pressure drop off
    « on: September 08, 2007 - 06:57:40 PM »
    440, 6pk, (all newly built), alluminum heads, headers, 10;1 compression.  I just installed new fuel pump, pressure gauge. Since new fuel pump, pressure went from 1 lb, to 4 lbs, but drops to "0" after idling for about 15 min.  I added fuel treatment, no help.  any idea's B4 I stick this car in a barn!!! Just kidding.

    Cudaaah
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    Offline matt63

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    Re: fuel pressure drop off
    « Reply #1 on: September 08, 2007 - 08:02:16 PM »
    Couple of things to check...the fuel pump push rod could be worn or there is a problem with the fuel line somewhere between the tank and the pump (squashed/plugged)
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    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD

    nivvy

    • Guest
    Re: fuel pressure drop off
    « Reply #2 on: September 08, 2007 - 08:08:30 PM »
    do you have a adjutable fuel pressure regulator.... should be running about 6lbs...
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    Offline Bullitt-

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    • Better Things To Come Member Since 2/16/06
    Re: fuel pressure drop off
    « Reply #3 on: September 08, 2007 - 08:11:33 PM »
    recently a member here was having issues & it turned out the rubber supply hose to his pump was collapsing from the suction
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    Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
    Screwed by Photobucket!

    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: fuel pressure drop off
    « Reply #4 on: September 09, 2007 - 04:23:19 AM »
    Was the fuel pump pushrod replaced when the engine was rebuilt ?
     I would check that first
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    Challenger - You`ll wish You Hadn`t

    Offline MEK-Dangerfield

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    • I don't get NO respect! Member since 1/25/2002
    Re: fuel pressure drop off
    « Reply #5 on: September 09, 2007 - 07:35:23 AM »
    ...If none of the above, is the fuel filter clogged, or maybe there is a loose connection/cracked rubber hose, letting air into the line?



      Mike
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    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline cudaaah

    • Jr. Member
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    • Posts: 310
    • 71 HEMI cuda, 2015 ram 2500 mega cab diesal 4x4
    Re: fuel pressure drop off
    « Reply #6 on: September 09, 2007 - 10:53:27 AM »
    Thanks for the input.  I took my HD up to the local Sat night car meet (1st time there).  Probably 50+ cars, only 2 mopars :stomp:, 73 duster, and an old Satellite. 

    Juices flowing :cooldancing:, I decided to give it a shot driving up (20 miles or so)  Again I did just put the fuel treatment in (sea Foam) but haven't had the confidence to drive do to the flat bed bringing me home the last 2 times.

    I made it up, and back w/ out any problems w/ shutting down : :clapping: :woo: 

    I'm going to check the fuel pressure issue, after this tank runs out and I put clean gas in.  Hopefully things were gummed up from sitting.

    Thanks Again, I

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