I'm at a loss and grabbing at straws...

Discussion in 'Street/strip 400/430/455' started by Brett Slater, Jul 27, 2021.

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  1. Brett Slater

    Brett Slater Super Moderator Staff Member

    I have and they looked good, yes.
     
    Brett Slater, Jul 28, 2021
    #21
  2. Brett Slater

    Brett Slater Super Moderator Staff Member

    Not adjustable. My machinist measured per TA's instructions and then I ordered the correct length.
     
    Brett Slater, Jul 28, 2021
    #22
  3. Brett Slater

    Brett Slater Super Moderator Staff Member

    Inspecting all the hoses is next on the list.

    I had the tank out a couple years ago and forgot to do it.
     
    Brett Slater, Jul 28, 2021
    #23
  4. Brian Albrecht

    Brian Albrecht Classic Reflections

    Intermittent + Breaks Up = Ignition
     
    Brian Albrecht, Jul 28, 2021
    #24
    69GS430/TKX likes this.
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Be a mechanic, not a parts changer. Mechanics test, and act on observable results of that testing. Parts changers change parts willy-nilly hoping they will fix the problem. Guess who is frustrated more, and ends up spending more money.:D
     
    LARRY70GS, Jul 28, 2021
    #25
    chrisg, 69GS430/TKX, john.schaefer77 and 1 other person like this.
  6. Mike B in SC

    Mike B in SC Well-Known Member

    My '71 Stage 1 did something similar to this when I first bought it. It wouldn't pull past 4000-4500 without breaking up. Turned out to be worn distributor bushings. After checking just about everything else, I grabbed the end of the distributor shaft and wiggled it. It had noticeable play. I replaced it with a rebuilt distributor from the local auto parts store and the problem was fixed. I did save the original 016 Stage 1 distributor. I didn't turn it in for the 5-10 dollar core charge.
    I'm not saying this is your problem but it doesn't cost anything to check.
     
    Mike B in SC, Jul 28, 2021
    #26
    69GS430/TKX likes this.
  7. 69a-body

    69a-body Well-Known Member

    I've had this symptom on two occasions. One was a weak fuel pump. The second time it was a weak ignition coil. Both had similar symptoms. A coil swap takes 15 seconds .
     
    69a-body, Jul 28, 2021
    #27
    69GS430/TKX likes this.
  8. sriley531

    sriley531 Excommunicado

    ^^^This^^^

    Taulbs speaking from hands-on experience, I was there.

    I'd still install the Robbmc pump if you e got one, I loved mine and kinda wish I had stayed with that setup.
     
    sriley531, Jul 28, 2021
    #28
    BUICKRAT and Brett Slater like this.
  9. 72STAGE1

    72STAGE1 STAGE 1 & 2

    Ignition problem sounds to me.
     
    72STAGE1, Jul 28, 2021
    #29
  10. Brett Slater

    Brett Slater Super Moderator Staff Member

    Ignition is a rebuilt, recurved unit with all new internals.

    The coil I put in yesterday is a new unit I've had in stock since last year. This is the second or third one I've tried.

    At some point you have to rule out ignition.
     
    Brett Slater, Jul 28, 2021
    #30
    69GS430/TKX likes this.
  11. Brian Albrecht

    Brian Albrecht Classic Reflections

    Sure. Just as soon as you conclude you've found the smoking gun.
     
    Brian Albrecht, Jul 28, 2021
    #31
    Brett Slater likes this.
  12. Brett Slater

    Brett Slater Super Moderator Staff Member

    This is the 3rd distributor I've tried with this build.

    And the fuel filter is new as well.
     
    Brett Slater, Jul 28, 2021
    #32
  13. Brett Slater

    Brett Slater Super Moderator Staff Member

    Plug wires are brand new 7mm Fire Cores.
     
    Brett Slater, Jul 28, 2021
    #33
    Dwayne B likes this.
  14. Brett Slater

    Brett Slater Super Moderator Staff Member

    This distributor was also tested on the builder's GSX before he shipped it back to me.
     
    Brett Slater, Jul 28, 2021
    #34
  15. Brett Slater

    Brett Slater Super Moderator Staff Member

    Agreed but how many different units of the same part do you swap in and out before you figure it's time to move on?

    Hence "grabbing at straws".....

    This car isn't much fun anymore, I know that much.
     
    Brett Slater, Jul 28, 2021
    #35
  16. Brett Slater

    Brett Slater Super Moderator Staff Member

    New engine and front light harnesses last April.

    That motor was old and tired but this was never an issue.
     
    Brett Slater, Jul 28, 2021
    #36
  17. Matt Knutson

    Matt Knutson Well-Known Member

    Whats the distributor rotor look like? Is the blade nice and shiny clean? Sometimes a film of corrosion can build-up on the leading edge.
    My dad used to run the engine in the dark and fine mist the ignition with water and sometimes it would reveal a suspected electrical leak (arcing). You don't need a lot of moisture, either. I'd check the resistance of the wires, too. Curiously, what brand spark plugs are you running?
     
    Matt Knutson, Jul 28, 2021
    #37
    69GS430/TKX likes this.
  18. Brett Slater

    Brett Slater Super Moderator Staff Member

    Rotor is shiny, yes and I'm running Autolite #23 plugs.
     
    Brett Slater, Jul 28, 2021
    #38
  19. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I have no idea what that means. Are they spiral core or those carbon core wires?
     
    LARRY70GS, Jul 28, 2021
    #39
  20. 87GN_70GS

    87GN_70GS Well-Known Member

    Pull the dipstick and smell the oil for presence of gasoline
     
    87GN_70GS, Jul 28, 2021
    #40
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