so long story short, i have a 96 a4 2.8l with just over 300k ( i know high miles), any way it has some usual issues, gas gauge dosent work hvac fan is dieing, so i was driving the gf to work yesterday morning, fired up fine...but seemed like it needed to warm up?...let it idle for a min...seemed to rev fine after that...on the way to work i drove thru a "small lake" and one min later it bogged down, almost acting like it was out of gas, so i got gas, nothing, read up on the whole water plenum thing...found a inch of water around the sealed "computer" box on the drivers side, sucked it out opend the box, it was dry inside..let it sit till today at noon still nothing.....ideas? fuel pump relay? ecm? electrical still wet? please help me

 

update, gf tried to start it before the tow truck came and it fired! said it ran real rough but now its back to just turning over...seems to want to try to start but wont..anyway thinking of replacing the fuelfilter and see if that does it...any good way to check for fuel pressure ?

 

If you have 300K miles and never done the fuel filter, do it. Not sure that's the problem but its cheap and they do clog. When you do it blow through the old one, then through the new one. You'll see a big difference.


If your starting problem had anything to do with water, I'd pull some plug wires and check for spark before anything. Might even take some resistance readings around the coils to see if they're happy.