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Thread: Fuel questions.

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  1. #1
    2,000 rpm - light wheelspin, no bog here! blenderblast's Avatar
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    Fuel questions.

    Okay, I need to know how the fuel system works. My '97 isn't getting any fuel pressure. I've changed the fuel pump to a known working walbro 255 (my car is turbo-ed), still nothing. Changed the fuel pump relay. Nothing.
    What do I need to check? Are there any areas that could have a clogged line by any chance that wouldn't allow any fuel pressure?
    "You can't believe most of the qoutes you read on the internet." Abraham Lincoln
    "Eighty percent of success is showing up" - Woody Allen

    1990 Red Miata - Stock Slammed. (3/16/2011 - 8/19/2012)
    1997 BRG Miata - Turbo-ed. 200rwhp @ 8psi. (DD) (11/29/2011 - Present)
    1996 White Miata - Stock. (7/13/2012 - 1/07/2013)

    Green Machine ('97) Build Thread: http://mazdaroadster.net/showthread....e-Build-Thread

  2. #2
    2,000 rpm - light wheelspin, no bog here! adamvanxxx's Avatar
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    The fuel filter?

  3. #3
    2,000 rpm - light wheelspin, no bog here! blenderblast's Avatar
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    97 BRG Miata (Turbo)
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    Are there any visible signs that would let me know the fuel filter is bad? Or do I have to take it off to run liquid through it?
    "You can't believe most of the qoutes you read on the internet." Abraham Lincoln
    "Eighty percent of success is showing up" - Woody Allen

    1990 Red Miata - Stock Slammed. (3/16/2011 - 8/19/2012)
    1997 BRG Miata - Turbo-ed. 200rwhp @ 8psi. (DD) (11/29/2011 - Present)
    1996 White Miata - Stock. (7/13/2012 - 1/07/2013)

    Green Machine ('97) Build Thread: http://mazdaroadster.net/showthread....e-Build-Thread

  4. #4
    2,000 rpm - light wheelspin, no bog here! adamvanxxx's Avatar
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    Its a maintenance part, just replace it.

  5. #5
    1,000 rpm - releasing the clutch Soledad's Avatar
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    Can you hear the FP turn on when you turn the ignition to the 'ON' (engine not running) position?

  6. #6
    Forum Sponsor revlimiter's Avatar
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    There's a fuel pressure check pin in the little diagnostic box (used for TEN and GND when setting timing).



    Put a jumper between F/P and GND and you'll be able to pressurize your fuel rail. Or you will when things are working. =)

    Did it just suddenly stop getting fuel? Or did you change an engine and get into your fuel system, possibly crossing the feed and return hoses when you put things back together?

  7. #7
    2,000 rpm - light wheelspin, no bog here! blenderblast's Avatar
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    I've been looking for that rev limiter!
    It just suddenly stopped working. It has done this before, but I swapped a different fuel pump relay and it worked fine. That didn't work this time.
    My fuel pump makes noise when it wants to. Sometimes I'll hear it, sometimes I won't. It has a mind of its own. I have asked around from a few guys who have walbro 255s in their car, and they say they have the same problem. Makes the whining noise whenever it wants to.
    "You can't believe most of the qoutes you read on the internet." Abraham Lincoln
    "Eighty percent of success is showing up" - Woody Allen

    1990 Red Miata - Stock Slammed. (3/16/2011 - 8/19/2012)
    1997 BRG Miata - Turbo-ed. 200rwhp @ 8psi. (DD) (11/29/2011 - Present)
    1996 White Miata - Stock. (7/13/2012 - 1/07/2013)

    Green Machine ('97) Build Thread: http://mazdaroadster.net/showthread....e-Build-Thread

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