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Thread: Misfire, Part MVIXXIVIIXXI

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  1. 10-23-2007 07:12 PM #1
    SCIV's Avatar
    SCIV
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    Angry Misfire, Part MVIXXIVIIXXI

    This is getting old.

    Thought I was good to go after cleaning out the injectors & rails. NOPE.
    Found a burnt plug wire and one with a nick, so I replaced them all. That was last week and 200 miles since then (and about 2+ hours straight of driving and looking at houses), and all has been good until today. Running about 80 mph on the highway, it starts to miss again. Exited and got to a light, and it is misfiring the same way again. Checked everything I could, but no luck.

    Killed the truck & restarted, performed that cycle about 5 times, then it starts and is fine. Shook out all the wiring and harnesses to no avail. Drive off, and about 100 yards and starts again. Killed it, let it sit for 20 min, started right up, purred like a kitten all the way back (15 miles). Even stopped at the dealership to talk to my buddy about it, and it still ran fine. Drove back to work, everything is cool. Killed it, left work about an hour later, drove home and all is fine.

    I am stumped why it would act like this?
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  2. 10-23-2007 07:25 PM #2
    RedHeartbeat
    RedHeartbeat is offline WTH JUST HAPPENED?
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    Did you ever check your grounds? Do you have a ground going from the battery directly to the engine block?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  3. 10-23-2007 08:22 PM #3
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    SCIV
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    Did you ever check your grounds?

    Umm, yes. And ummm, they were tight right after I just tightened them!

    What are the odds 2 ground wires at the rear of the block on top were loose?
    If that fixes it, I will by you a case of whatever you like to drink (limited to beer budget!)

    Do you have a ground going from the battery directly to the engine block?
    Yes, the large ground. Smaller ground goes to front of frame.

    I hope that was it Greg.
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  4. 10-23-2007 08:39 PM #4
    RedHeartbeat
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    Quote Originally Posted by SCIV View Post
    If that fixes it, I will by you a case of whatever you like to drink (limited to beer budget!)
    Do you deliver?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  5. 10-24-2007 08:34 AM #5
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    Quote Originally Posted by RedHeartbeat View Post
    Do you deliver?
    Sorry, a man has his limits!!

    Give me your Fedex or UPS shipping account, and it will be there tomorrow!
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  6. 10-23-2007 07:29 PM #6
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    Are you running 60lb inj? If so I wonder if some in the know would know if the versafueler or something similar will help.
    http://www.ls1truck.com/forums/power...rsafueler.html
    99RCSB Broke because I wasted thousands and thousands of dollars on my truck.
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  7. 10-23-2007 08:23 PM #7
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    Quote Originally Posted by zeake View Post
    Are you running 60lb inj? If so I wonder if some in the know would know if the versafueler or something similar will help.
    http://www.ls1truck.com/forums/power...rsafueler.html
    Yup, 60 #ers.
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  8. 10-23-2007 10:05 PM #8
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    You're a genius Greg.

    Like to the point of pissing me off.

    But you're a genius.
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  9. 10-24-2007 02:05 AM #9
    ff_jeff Guest
    funny how its always the last thing it could be, that fixes it...
    good job red!
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  10. 10-24-2007 07:33 AM #10
    RedHeartbeat
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    We discussed it in an earlier post, someone just didn't check it back then.

    Its kind of like when you lose something, you always find it in the last place you look. If you found it, why would you keep looking for it?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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