Fiat Dino Stalls at Stop Signs/Lights | FerrariChat
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Fiat Dino Stalls at Stop Signs/Lights

Discussion in 'Other Italian' started by Sharknose1, Mar 17, 2025.

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  1. Sharknose1

    Sharknose1 Rookie

    Mar 29, 2015
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    John Harrill
    #1 Sharknose1, Mar 17, 2025
    I have a 2.0 liter coupe (1967) that starts and runs very well. Carbs rebuilt recently. Ignition is new - MSD and Pertronix trigger, wires.
    However, with the warm idle set at 800 rpm, when I come to a stop, the engine revs drop and it dies unless I blip the throttle.

    Nearly everything in the car is new, having just finished a lengthy restoration:
    New fuel tank, gold top Bendix pump, all lines, FilterKing filter, etc.

    Thoughts?
     
  2. DWR46

    DWR46 Formula 3
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    Jun 19, 2012
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    #2 DWR46, Mar 17, 2025
    Recheck the carburetor float heights and drops.
     
    NYC Fred, velocetwo, 19633500GT and 1 other person like this.
  3. 71Satisfaction

    71Satisfaction Formula 3

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    Art
    #3 71Satisfaction, Mar 17, 2025
    How does it idle after start-up cold? .. and how does it idle after start-up hot?

    .. or idle air mixture setting?
     
  4. TheMayor

    TheMayor Ten Time F1 World Champ
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    #4 TheMayor, Mar 17, 2025
    Last edited: Mar 17, 2025
    I am having a similar problem having just rebuilt the carbs. I'm sending the set to Dinopoint for a bench set up in a few weeks. I'll let you know what they find.

    To me its a fuel starvation issue caused by heat in the carbs. I don't believe its electrical.

    The other possibility is too much oil vapor from the crankcase while idling.

    I was told the correct air cleaner is really critical also. I'm sending them the entire air cleaner and filter for evaluation.

    I'm also chasing the power drop off at 3000 RPM also, which I also believe is carb related. But I am sending the Distributor to them also for set up and conversion to electronic ignition in case that is also an issue.
     
    Texas Forever likes this.
  5. Sharknose1

    Sharknose1 Rookie

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    #5 Sharknose1, Mar 19, 2025
    Hot and cold start idles are good. And I'm getting a nice tan color on the plugs.
     
    velocetwo and 71Satisfaction like this.
  6. 71Satisfaction

    71Satisfaction Formula 3

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    #6 71Satisfaction, Mar 22, 2025
    I apologize if you now this already. If you are checking your sparkpugs for color after the engine has been idling - for even a short amount of time - there is a possibility that your mixture is set too lean. The ideal condition is to go WOT, then shut engine down, then check plug color.
     
  7. Sharknose1

    Sharknose1 Rookie

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    #7 Sharknose1, Mar 26, 2025
    Tan color on the plugs is seen only after driving it fully warmed up....and giving it the beans a little.
     
    71Satisfaction likes this.
  8. velocetwo

    velocetwo F1 World Champ

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    #8 velocetwo, Mar 27, 2025
    Last edited: Mar 27, 2025
    I would check floats . There is an air bypass adjustments on webers make sure all your carbs are balanced at rest . they should suck the same amount of air. I would also check the fuel pressure
     
    71Satisfaction likes this.

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