Hesitation on starting after driving

[Dave Fehrle]

I have noticed that after I drive for 5-10 miles or more and then shut off the car, it hesitates when I go to start? Anyone experience this before and if so, what was the fix?

[Dennis P. DiBari]

Hi Dave,

     After driving for a while, shut it off and pull the air cleaner and look to see if gas is dripping into the carburetor.  Does it sound like it is partially flooded?  Also, when the engine is cold, how is the choke setting?  It should close well when cold and open fully after 3-4 minutes when engine warms.  If it does, start adjusting with the large idle screw in the rear of the carb. (Rochester carb.), and finish with the two front air/fuel mixture screws.  Try not to adjust it too rich.  I hope this helps.  If the choke does not open when hot, the heat riser/internal choke tube may be faulty.

Dennis DiBari, Cottekill, NY

[Dennis P. DiBari]

Hi Dave,

  One more thing with the carburetor.  If gas is dripping into the carburetor when off, it could be dirt impeding gas flow.  At the shop, we used to disconnect the fuel line from the carb. and plug it tight.  Then, run the carburetor dry till it stops.  Then reconnect the fuel line and start the car.  Sometimes, the fresh flow of gas cleans the needle and seat.  Make sure your hands are clean and the fuel line is tightly plugged when disconnected.

Dennis DiBari

[Dave Fehrle]

Thank you Dennis. I will do those items. 
I forgot to mention that it sounds more like the battery is low and causing the hesitation. The engine will turn over once, then paise for a sec or 2, the kick over and start. 

[Dennis P. DiBari]

Hi Dave,

     What you described could be a faulty solenoid/starter, if the battery is strong putting out 12.3 volts.  Check the connections on the battery and down on the starter to rule out a bad connection.  Start with a strong battery to properly diagnose the situation.  If it still happens, it could be down at the starter.  If it's pretty old, may have to be rebuilt.  Hope this helps Dave!

Dennis DiBari