Distributer drawing moisture
There is no such engine as a 350 magnum
Bad plugs? Bad plug wires? Bad coils? Bad head gasket?
Vapor-lock in the carburetor.
Mask Hill
The Cam Position Sensor will sometimes cause an intermittent skip as it begins to fail.
A 2000 Chevy Venture might skip while driving because of water in the fuel or damaged or dirty fuel injectors. You might also have an issue with the distributor.
Most common cause is. Bad plug wires and or bad spark plugs. Time for a GOOD tune-up.
i have a 1991 nissan sentra speed up to 35 and start to miss
Grey smoke can actually be one, of two things. A lean misfire condition, which will cause the engine to surge at cruising speeds, which would seem like a skip, or miss. The other would be if it were steam, like water leaking into the cylinder, and burning. You would have to be adding water to replace that is leaking into the cylinder, and it would hot, from time to time.
Yes it can cause spotting which would be classed as a mild withdrawal bleed and it also puts you at risk of pregnancy. You need to use a condom for 4 weeks
Sounds like you need the clutch adjusted or replaced .
check for tune-up. chack mass air flow meter.