Carb help needed

Discussion in 'Technical' started by ptpdub, Apr 1, 2015.

  1. ptpdub

    ptpdub Member

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    i have a 600 cfm Holley on my 302. My car starts well when cold. Usually stumbles and dies after running for 5 or 6 seconds. Then fires right back up and runs well. Here is the problem. If I try to start the engine hot, I need to go to wide open throttle to fire the engine. My engine is electronic ignition, mechanical fuel pump. What do I need to look at to solv the hard start when hot issue?
     
  2. Krazy Comet

    Krazy Comet Tom

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    Long crank times when hot, necessitating holding throttle at WOT generally indicates a flooded condition... Generally issue is fuel percolation caused by too high of float level, can also be aggravated by lack of insulator under carb...
     
  3. BKelley

    BKelley Comet Enthusiast

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    x2 on the float level and/or lack of carb spacer/insulator
     
  4. ptpdub

    ptpdub Member

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    ok, I have a 1 inch spacer under the carb, so now we look at float level. thank you for your help.
     
  5. baddad457

    baddad457 Member

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    Also check to see what the choke (if it's an automatic unit) is doing. If it's got a manual choke, check to see that the butterfly is open. If it is manual and you didn't hook it up, it should be either removed altogether or wired open. Me? I remove them completely and use the go pedal to warm it up when needed.
     
  6. ptpdub

    ptpdub Member

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    ok, in order to adjust the choke, I loosen the 3 screws around the round black plastic pod with the electrospring inside, rotate the pod to open the choke fully when engine is hot. anything else? is this method correct?
     
  7. 71gold

    71gold Frank Cooper Supporting Member

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    that's one way....:thumbs2:
    make sure the spring is hooked up/not broken.
     
  8. Hotrock

    Hotrock Rick, an MCCI Member Supporting Member

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    That procedure may disable the choke all together. It is best to set the choke with the engine cold. Check out this 3 minute youtube video for a simple process.

    https://search.yahoo.com/search;_yl...=mss&ei=UTF-8&p=how to set an automatic choke
     

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