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Thread: weird pulse??

  1. 07-29-2008 04:58 PM #1
    ChevyLee's Avatar
    ChevyLee
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    Angry weird pulse??

    The truck won't start on the first try when it has been sitting for a little bit. I have no idea why it does this, i replaced the FPR twice and it is still doing this..
    Also when the truck is hot, i try to start it and it pulses at idle, if i put it in gear it dies. here is a small clip of the pulse, i dont know if its in the tune, allen re tuned it and it is still doing it so i have no clue. I know there was a bad batch of walbro 255 pumps going around, could that be my problem??
    Also everything else seems OK...
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  2. 07-29-2008 05:18 PM #2
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    COWL327
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    Sounds like its getting fuel when its setting.....it has to clear out.Rev it a little when you start it to clear it
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  3. 07-29-2008 05:29 PM #3
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    Quote Originally Posted by COWL327 View Post
    Sounds like its getting fuel when its setting.....it has to clear out.Rev it a little when you start it to clear it
    just did that, an it clears it out for a few seconds but then pulses again... and still wont start on the first try
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  4. 07-29-2008 05:30 PM #4
    RedHeartbeat
    RedHeartbeat is offline WTH JUST HAPPENED?
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    Bring it over and we'll figure out whats going on.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  5. 07-29-2008 05:31 PM #5
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    Quote Originally Posted by RedHeartbeat View Post
    Bring it over and we'll figure out whats going on.
    Im leaving Saturday morning for dallas and not leaving until Sunday night or Monday
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  6. 07-29-2008 05:34 PM #6
    RedHeartbeat
    RedHeartbeat is offline WTH JUST HAPPENED?
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    Sounds like a plan.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  7. 07-29-2008 05:37 PM #7
    Ramsey
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    could be a dirty injector ,bad fuel pump.check your fuel pressure then drive down the rd with the gauge on youre windshield and see if it loses any.ive had terrible luck with warlboros,and refuse to use em .alot of guys like em but ill never use 1 again.check all of youre connection going to the throttle body also ,mine will act like that when ive blown a fitting of my s.c. going to the tb.process of elimination,check fuel pressure then let us know.
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  8. 07-29-2008 11:59 PM #8
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    Looks as if it is a tuning issue to me...

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  9. 07-30-2008 12:10 AM #9
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    what about a leaking fuel pressure regulater on the drivers side fuel rail have seen those fail numerous times
    02 ecsb small motor, small cam, small shot
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  10. 07-30-2008 10:09 AM #10
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    Quote Originally Posted by 1slow02 View Post
    what about a leaking fuel pressure regulater on the drivers side fuel rail have seen those fail numerous times
    replaced it twice. this video was taken about 1 hr after i put a new one in..

    i have a feeling i have a bad 255 fuel pump..
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