QuestionI have a 1966 Mustang with a 6 cylinder and an autolite 1100 carburator. The issue I am having is that when I turn off the ignition the car will sputter a few times before it dies.
AnswerHello Jeff,
Your problem most likely is traced to excessive carbon in the cylinders that glows following shut off and ignites any residual fuel or the carburetor is allowing gas to continue to drip into the engine following shut off.
We used to call this condition "dieseling" and it will take a little detective work to pin down:
1)Perform a minor tune-up (points, plugs and condenser) and make sure all settings, including timing, are within spec.
2) Get some Marvel Mystery Oil or similar upper cylinder (Top oil), add to fuel.
3) If car is not regularly run at highway speeds, find a interstate type highway and run the car at 60+ a minimum of 20 miles. If this is a carbon problem, we want to give the engine plenty of time to burn off any residual carbon and soot-- a good, high speed run will help do this.
4) If the preceding fails, check the carburetor for leaks and settings, particularly the float level. A too high setting will have gas being continuously added despite throttle position and could cause the engine to run-on like this.
Try the preceding in sequence and let me know.
Good luck,
Bob
