Diagnosing Hot Start Prob on '78 Carb 308 | FerrariChat
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Diagnosing Hot Start Prob on '78 Carb 308

Discussion in 'Technical Q&A' started by 2dinos, Apr 1, 2014.

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  1. 2dinos

    2dinos F1 Rookie

    Jan 13, 2007
    3,021
    #1 2dinos, Apr 1, 2014
    Cold start is great. Crank revolves 2 to 4 turns and it easily comes to life.

    Hot start ----- not so great. Hold gas pedal to floor. Do not pump. Turn key, and I think it takes a solid 15 seconds (maybe more) to reluctantly start. I feel bad for the starter! Once started, it runs well. No misfires, smooth, strong etc. I was thinking floats are too high?? But how to check?

    One person suggested taking air filter cover off when hot, and look at butterflys before starting. If they are wet with fuel, fuel is dribbling out of carbs due to percolation. I could just lower floats a mm, but I'd like to know I'm chasing the right problem.
     
  2. MiuraP400

    MiuraP400 Formula Junior

    Feb 3, 2008
    951
    Arizona
    Full Name:
    Jim
    #2 MiuraP400, Apr 1, 2014
    The advice you were given is exactly the same as what I would have given you.

    Cheers Jim
     
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,785
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #3 Steve Magnusson, Apr 1, 2014
    Too much throttle IME. 1/4 gas pedal open without pumping worked fine for me when hot -- have you tried that?
     

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