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- #21
mcditalia
Well-known member
Does the car accelerate normally with a slow gradual push on accelerator pedal? But a sudden and aggressive push results in stumble. If this is case, the accelerator pump in carburetor may not be supplying enough fuel or no fuel at all.
Now back to original post asking why is the vacuum hose to distributor blocked off .
Someone(Bubba?) removed hose to set the engine idle ignition timing and didn't hook it back.
Or.
There is a problem within the distributor with vacuum advance. (1)The advance diaphragm is busted and leaking vacuum. (2)The breaker plate may be binding and not responding to vacuum properly. Someone(Bubba again?) plugged the hose as a work around.
Simple fix in one case, reconnect hose, but second case will require checkout and repair of distributor. Check of idle and advance timing should be done in any case.
Then hope Bubba didn't change anything else. :eyerole
Car accelerates normally with slow application of throttle, only with sharp aggressive push results in stumble and detonation. At this point im thinking vacuum advance or accelerator pump in carb also. Will have to check initial timing.