sense the problem began after hitting water..the problem may be the ignition coil...the water could have caused the coil to crack,,it may be a hair line crack and may not be able to see it
that will be fine
lets unplug the vacuum line from the egr valve....unplug it and put a screw or something in the vacuum line to block the vacuum.....let me know if that makes a difference
ok...does the engine light stay on?if so,,can you give me the trouble codes?
lets do this
there is no codes stored,,strange........
check the vacuum line to the map sensor,,,make sure it is connected and has a vacuum on it
sorry had computer trouble here..
tell me..does it blow any black smoke out the exhaust?
does it do this with the engine cold and hot?
yes,,a clocgged muffler could cause this,,,but the engine would be really quiet if this is the case...i am thinking your problem may be the pick-up coil inside the distributer,if this is the case,you may just want to replace the complete distributer with a new rebuilt unit,sense the distributer will need to come out and apart to replace the pick-up
you are running out of possibilities here
well.if it isnt broken off..it should be on the timing cover