A little water may show up as a random missfire (P0300). A lot of water and the engine wouldn't run at all.
Yes, water can cause a misfire, which will cause the check engine light to flash.
Contaminated fuel could cause a misfire.
It depends how much water was put into your tank and if it has ran through your auto. Usually if a car has been left to sit for a period of time condensation will build in the gas tank which will cause white smoke to come from the exhaust. If water was put into the gas tank it is best to drain the tank and adding new fuel with a quart of fuel drier. The car will most likely not run if the water to gas ratio is high but as far as permanent damage goes it is not likely. Water would have to sit for a long period of time to corrode and make a hole in your tank which will cause the gas tank to have a leak. In some cases your car might have a misfire if water is in the fuel lines. The best thing to do is to go to your local honest mechanic and have him run a diagnosis.
If it's a gas tank then that is possible.
can low grade gas cause a misfire, I don't think so but, Contaminated (water, etc) gasoline could. Flow restriction (plugged fuel filter, plugged fuel injector) could. Incorrect fuel pressure could.
the gas line from the tank might have trash in it the gas line from the tank might have trash in it
water in gas tank
Could be, spark plug(s), contaminated fuel (water),
water can be pumped in from a leaking underground tank at a gas station or if you leave your gas tank only partially full and the temperature shanges it can cause condensation inside your tank
The cause of the leaking gas from teh Union Carbide Factory was becuase someone purposely put water in the gas storage tank.
misfire,step hard on pedal, softly,going slow and idling
It might cause your car to stall depending on how much was put in.