fuel starvation even in a straight line - Page 2
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This is a discussion on fuel starvation even in a straight line within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; are you running a WBO2? what's your AFRs? Especially when it's doing this.. You logging the car? Could be a ...

  1. #16
    Geriatric Ginger Mod Rogan's Avatar
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    are you running a WBO2?
    what's your AFRs? Especially when it's doing this..

    You logging the car?
    Could be a number of things - not just fuel.
    Rogan o_0
    '96 Dodge 2500 CTD @ 40psi - over 700 lb/ft TQ, 7" stack, and 5speed! - SOLD
    '01 Dodge 2500 CTD 6-holed hand-shaker - 3850# dual disk - 900 lb/ft - SOLD
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  3. #17
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    Quote Originally Posted by Rogan View Post
    are you running a WBO2?
    what's your AFRs? Especially when it's doing this..

    You logging the car?
    Could be a number of things - not just fuel.
    Unfortunately i don't have the equipment to do the logs which I know is making things more complicated.

    But do keep in mind, I DO NOT have this issue when the tank is FULL

  4. #18
    Geriatric Ginger Mod Rogan's Avatar
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    hmm..
    will it do it, in the driveway, just creeping the throttle up, to the desired RPM? Or only when the car is under load?

    with it doing it at lower fuel levels only, I'd look at the mounting of the pump.. it's definitely a weird issue..
    Rogan o_0
    '96 Dodge 2500 CTD @ 40psi - over 700 lb/ft TQ, 7" stack, and 5speed! - SOLD
    '01 Dodge 2500 CTD 6-holed hand-shaker - 3850# dual disk - 900 lb/ft - SOLD
    '97 Dodge 3500 CTD DUALLY built Auto - 40psi boosties - 750 lb/ft

  5. #19
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    Quote Originally Posted by Rogan View Post
    hmm..
    will it do it, in the driveway, just creeping the throttle up, to the desired RPM? Or only when the car is under load?

    with it doing it at lower fuel levels only, I'd look at the mounting of the pump.. it's definitely a weird issue..

    It will only do it under load only. Like if i gradually give it gas up to that rpm, it won't have this issue.

    weirded indeed. It only does it when the tank is less than 1/2 full

    Has anyone heard of placing a tube between the filter and the pump so the pick up sits lower in the tank?

  6. #20
    Geriatric Ginger Mod Rogan's Avatar
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    check plugs..
    go 1 step colder, pinch the gap a little.. Mine are .028". almost sounds as though the boost is blowing the spark out.


    edit: wow! I meant to post this like forever ago Guess i never hit the submit button on it, earlier..
    Last edited by Rogan; 04-04-2008 at 06:45 PM.
    Rogan o_0
    '96 Dodge 2500 CTD @ 40psi - over 700 lb/ft TQ, 7" stack, and 5speed! - SOLD
    '01 Dodge 2500 CTD 6-holed hand-shaker - 3850# dual disk - 900 lb/ft - SOLD
    '97 Dodge 3500 CTD DUALLY built Auto - 40psi boosties - 750 lb/ft

  7. #21
    Geriatric Ginger Mod Rogan's Avatar
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    Quote Originally Posted by justinklam View Post
    It will only do it under load only. Like if i gradually give it gas up to that rpm, it won't have this issue.

    weirded indeed. It only does it when the tank is less than 1/2 full

    Has anyone heard of placing a tube between the filter and the pump so the pick up sits lower in the tank?
    It still doesn't make a lot of sense.. I'm really curious now..

    I've never heard of placing the tube in there..

    Odd question: Is your tank dented?

    edit: you really need to get that thing monitored (logged, etc.) That'd prolly pinpoint it.

    where are you?
    Rogan o_0
    '96 Dodge 2500 CTD @ 40psi - over 700 lb/ft TQ, 7" stack, and 5speed! - SOLD
    '01 Dodge 2500 CTD 6-holed hand-shaker - 3850# dual disk - 900 lb/ft - SOLD
    '97 Dodge 3500 CTD DUALLY built Auto - 40psi boosties - 750 lb/ft

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    Quote Originally Posted by Rogan View Post
    It still doesn't make a lot of sense.. I'm really curious now..

    I've never heard of placing the tube in there..

    Odd question: Is your tank dented?

    edit: you really need to get that thing monitored (logged, etc.) That'd prolly pinpoint it.

    where are you?
    I'm located in vancouver BC canada. probably quite far from you eh? lol

    well,i have no choice but to take my car to the mechanic and hopefully he can log it out and what not. I guess i'll update you guys when the resolution coms up.

    I don't understand why walbro isni't offering any warranty for their pumps IF that is the case the pump is a defect

  9. #23
    Geriatric Ginger Mod Rogan's Avatar
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    Have you tried putting your old pump back in?
    Rogan o_0
    '96 Dodge 2500 CTD @ 40psi - over 700 lb/ft TQ, 7" stack, and 5speed! - SOLD
    '01 Dodge 2500 CTD 6-holed hand-shaker - 3850# dual disk - 900 lb/ft - SOLD
    '97 Dodge 3500 CTD DUALLY built Auto - 40psi boosties - 750 lb/ft

  10. #24
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    Quote Originally Posted by Rogan View Post
    Have you tried putting your old pump back in?
    No i have not. If i put the old one back in, would I max it out and cause other issues?

  11. #25
    Moderator Donkey's Avatar
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    Unless you know how to bench test the Walbro putting the old one back in is the next step in the diagnosis.Since you donot have the ability to datalog or have a wideband O2.
    Resident Adviser @ WTF Tuning, LLC
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  12. #26
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    hmm.. i was just fixin to post a similar problem.

    a few times in the past months, when the gas was low and i would be heading around turns (fast), the fuel would cut out much like your describing but without the backfire. But today it started doing it in a straight line, and very bad in the turns. It sounds very similar to what yours is doing. I can rev it fine in the driveway, but under load it seems to give up at around 5000 rpm. the only difference if that i have no mods with the exception of a sti axleback and a rear sway bar. my first stab is going to be a new fuel pump tomorow, unless there is any other ideas out there.

    oh yea, i already changed the fuel filter when i first noticed the problem, but it did not seem to help.

  13. #27
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    yesterday i pulled the pump/float assembly out of the gas tank just to see if anything was noticably wrong. Turns out that white mesh screen attached to the fuel pump was covered in this light grey stuff that almost looked like wet cement. i cleaned it out and it appears to have fixed my problems completly.

  14. #28
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    got my car back. Turns out that one of the wires on the intake was loose. Each time there was a lot of load on the motor, it would tug on the wire causing it to lose connection.

    All is well now and the car drives damn well! =) thanx for everyones help

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