Results 1 to 6 of 6

Thread: misfire @ cruising speeds MSD digital E curve dist.

  1. #1
    Senior Member DYNO TECH
    Join Date
    Aug 2007
    Location
    Colebrook Connecticut
    Posts
    425

    misfire @ cruising speeds MSD digital E curve dist.

    car runs great at idle or full throttle
    but cruising at hiway speeds it misfires (kinda like spark scatter)
    low backfire in the exhaust aswell.
    but if I step into it the motor seems to run pretty good?
    I have the digital e curve set up using a MSD6AL aswell.
    both got good power from battery.
    hooked to the + post on battery.
    grounds are both on the valve cover hold down.
    btw aluminum heads and intake.
    engine grounded to frame and battery -.
    ground wire also between the engine block and valve cover hold down where the msd 6AL and digital e curve distributor are grounded.
    Seems im not the only one with this issue
    I talked to a guy at a carshow and noticed he had same problem with his digital e curve dist

  2. #2
    Senior Member DYNO TECH
    Join Date
    Aug 2007
    Location
    Colebrook Connecticut
    Posts
    425
    bump

  3. #3
    Senior Member DYNO TECH
    Join Date
    Aug 2007
    Location
    Colebrook Connecticut
    Posts
    425
    geez surely with 33 views someone might have a clue?

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
    Posts
    2,998

    Re: misfire @ cruising speeds MSD digital E curve dist.

    Quote Originally Posted by rabiddawg
    car runs great at idle or full throttle
    but cruising at hiway speeds it misfires (kinda like spark scatter)
    low backfire in the exhaust aswell.
    but if I step into it the motor seems to run pretty good?
    I have the digital e curve set up using a MSD6AL aswell.
    both got good power from battery.
    hooked to the + post on battery.
    grounds are both on the valve cover hold down.
    btw aluminum heads and intake.
    engine grounded to frame and battery -.
    ground wire also between the engine block and valve cover hold down where the msd 6AL and digital e curve distributor are grounded.
    Seems im not the only one with this issue
    I talked to a guy at a carshow and noticed he had same problem with his digital e curve dist
    I will take a stab at just something I see when reading what you posted. Keep in mind I do not or have never used a E Curve Dist.

    grounds are both on the valve cover hold down.
    ground wire also between the engine block and valve cover hold down

    Could be wrong here but try running the ground straight to the chassis, better safe then sorry for sure, a ground issue can cause all kinds of issues.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  5. #5
    Senior Member RACING JUNKIE lively's Avatar
    Join Date
    Nov 2004
    Location
    ILLINOIS
    Posts
    2,191
    IF YOU HAVE ANY/ ANY/ANY CORROSION BETWEEN THE HOLD DOWN BRACKETS AND THE OTHER GROUND WIRE TO THE BLOCK YOU ARE NOT DOING IT ANY GOOD

    UNLIKE METALS WILL CAUSE PROBLEMS AT TIMES[ALUMINUM AND CAST IRON!!]
    RUN THE GROUND STRAIGHT TO THE FRAME AND TRY THAT 8) 8)
    LIVELY

  6. #6
    Senior Member DYNO TECH
    Join Date
    Aug 2007
    Location
    Colebrook Connecticut
    Posts
    425
    I think I found the problem
    stripped out negative battery terminal connection
    (it was barely on)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy