i have a 650 dbl pumper on a small block, with an auto choke. when the car sits overnight or longer, when i pump it to set the choke and start. it always quits 2 or 3 times before it stays running. was told it could be fuel leaking back into the intake anyone have any ideas. thanks.

i had the same problem changed the ignition fuse and it started everytime from then on u may also want to check ur timing too.

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72' Chevelle SS (Clone)
TC Member#1417

This could be one of two things. Either the choke pull-off is not working, or the fast idle speed is too low. The choke pull-off is a small vacuum cannister that partially pulls the choke plate open as soon as the engine fires off so that the engine has enough air for combustion. On most carbs, the cannister is mounted on the passenger's side of the carb.

randy, how do i tell if the choke pull off is working? . the fast idle is set at 1500 rpm.thanks

Use a hand held vacuum pump, or pull the air cleaner lid and have someone start the engine while you watch the choke operation. When the choke is set, it should be closed all the way. Once the engine fires off, you should see it pull open about 1/8th to a 1/4th inch. Of course, this is done when the engine is stone cold.

thanks Randy i will check that out tomorrow, when i go for a fall ride.