run on ?

[komninon]

i turn the ignition off, and the engine still runs for 5 sec, then shuts off and smoke from the carb comes out.
msd ignition and dist. idle is not high.
how to fix the problem?

[dpm68]

I'm no expert, really, but your plugs may be fouled. How long have they been in and how many miles are on your engine?

[komninon]

new spark plugs, less than 200 miles.

[tan top]

idle speed too high  ,  too far advanced timing  ,   crappy gas