New Carb: Tuning or Timing?

Discussion in 'General Maverick/Comet' started by Northern, Sep 16, 2015.

  1. Northern

    Northern Member

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    I've started a new thread to continue the storyline, but focus on a different subject than the OP from the last thread. I've included the latter conversation that was fitting to the current topic, which will be in line with working the bugs out of a new carb/intake install.

    We can call this the OP for this thread and go from here:
    Wording it like this has me a little confused. Now I'm not sure its a studder, or bog. It idles perfect. I hit the key, it fires easy (asside from an electrical gremlin I've been chasing for months and will address in a new thread later) and just sets there purring, no choke, not throttle. As soon as I hit the throttle, its starts to come off idle, then it just starts choking out. I let off and idle picks right back up. There is a little back fire during this studdering, but not bad. If I start at idle and play with the throttle, teasing it a bit to get past that stalling point, then the RPMs will go up and it will seem to run ok. I drove it around the block and it didn't feel as strong as it should have.

    As soon as I bump the throttle, a stream fuel squirts in. Off idle it does not recover its self, I have to respond quickly or just dies.
     
  2. groberts101

    groberts101 Member

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    You likely have the throttle blades incorrectly positioned against the transition slot. Should look like a little square or slightly rectangular'ish when the throttle blades are clocked right. Very common issue and causes the exact problem you describe.. if in fact it has been verified that the squirter reacts instantly on tip in. Even barely touching the throttle should cause some drips to fall away from the nozzles when it's set tight enough.

    If setting the transition slot exposure correctly causes the idle speed to end up too high for your taste?.. close the secondary side a bit until it settles down. Primary side is the biggie to get right as the secondary side is easily covered up by the already active front boosters and the continuing pump shot stroke.
     
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  3. jasonwthompson

    jasonwthompson Member

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    Adjust the accelerator pump or the idle mixture.
     
  4. Northern

    Northern Member

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    I couldnt advance my timing any more because the distributor's vacuum pump was hitting the thermostat. Rotating a gear on the distributor wouldnt allow it to drop in all the way, so i just rotated all the plug wires 1 post. That gave me all the advance i need now. Ran like a champ today.
     
  5. Crazy Larry

    Crazy Larry Member

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    You could have re-stabbed the distributor to allow more room for the vacuum advance.
     
  6. 71gold

    71gold Frank Cooper Supporting Member

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    didn't you hear what he said..." Rotating a gear on the distributor wouldnt allow it to drop in all the way"...:slap:


    ...:)...
     
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  7. Krazy Comet

    Krazy Comet Tom

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    In that case you bump the starter so hex on oil pump drive lines up properly with in opening in dist shaft... I've done it probably 100+ times over the years...
     
  8. 71gold

    71gold Frank Cooper Supporting Member

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    ...or turn the oil pump drive shaft...:bouncy:
     
  9. Krazy Comet

    Krazy Comet Tom

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    That's too complicated and still probably won't get it right...

    With my method all one has to do is lift dist enough to move it a tooth, then set it back down... Bump starter, "clunk" it's seated... Your method requires disconnecting leads, pulling dist, using tool to turn the shaft and then hope you get dist installed in the position you wanted... No thank you... Oh yeah don't forget to reconnect the wiring...
     
  10. 71gold

    71gold Frank Cooper Supporting Member

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    sorry...didn't mean to "complicate" you...:slap:
     
  11. Krazy Comet

    Krazy Comet Tom

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    Well you have whoever performs your work do it to your specs, me I'm taking the path that's far more likely to give the desired results...
     
  12. 71gold

    71gold Frank Cooper Supporting Member

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    it's just messing gears...:huh:

    I stabbed my own dizzy (when I had one) just giving options...
     

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