2008 MS3 No Spark

I hit high water on Saturday when Harvey was starting, car bogged and would not restart. Intake was soaked. I had to have the car towed home. At some point during the storm, my parking lot flooded, a few people had water in their cars, some wouldn't start and they've had them towed to who knows where.

Anyway, I pulled my CAI apart, full of water. Turns out there was water in the Air intake, turbo, Intake manifold, and a little on top of the cylinders. plugs were wet, and there was just enough to cover the end of an extension.

Cylinders, Turbo, Air Intake, were dried. Oil pan dropped, cleaned. Some more water looked to come from the Trans side of the oil pan. No metal bits or pieces, everything looks intact on the crank. No sensors were touched.

New Plugs, new oil, everything dried out, put back together, and No Spark. Engine turns by hand with no issues, all fuses in engine bay look ok, also thought my Solenoid purge valve went out due to Fuel smell and EVAP not clearing for emissions, that was changed as well. Car does still have gas smell when cranking, so it is getting fuel to the cylinders, or appears to be anyway.

Ive checked connections, tried a few different things, and taken my time giving things time to dry out.

Does anyone else have any other thoughts or something else to look at or try before getting towed to the dealer, or worse case totaled by insurance? Only two long shots I have left and no way to test ATM, is compression check in case rings are damaged, or weak battery.

Does anyone else have any advice on what to try, look for, or check? I'm thinking it has to be something stupid simple I'm overlooking or not trying.

TL;DR - Part of Engine was under water, Water in intake system, Dried out, Maintenance done, Car Won't start.

 

How do you know you have no spark? Are you just guessing? you may have a bad maf sensor if it got wet. Check for water in the crank sensor plug. Hope you didnt hydrolock and bent a rod but you will know as soon as you get it running.

 

Ground wires not making proper contact somewhere? Especially the one near the HPFP?

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my money would be on the MAF

 

Some Updates. Uninstalled Access Port, and returned to stock map. Re tightened a few things, engine did have spark, turned oil filter 1/4 turn, Car did fire, idled, then died. Did this a couple times. Reinstalled Access port, reflashed map, car started but died quickly, and currently sounds like it won't turn over at all. Pulled Plugs, One is completely black, other three look ok.

Currently thinking Weak battery from the AP reinstall and Map re-flash, bad plug, or burned out starter from trying to crank off and on since it's been down. I verified engine still turns by hand, and pistons do move up and down... planning on reconnecting battery after charging, and see if car turns over. If so, replace the burned plug, and hope for the best.

Am I correct in thinking if the engine wont turn over after battery is re-installed, no plugs then the starter is out? Last time I tried cranking, there was just a really loud wine.

This one is a cascade of troubleshooting for sure. learning a lot, and most has been trial and error. I''ve never had issue's this major with this car. Always open to continued advice, and suggestions for what else to check, and look out for.

Thanks for the replies so far, they are GREATLY appreciated.

 

You can look at maf volts o2 ect... with the key on engine off to make sure they are reading right. If flashing a diffrent map makes it run where the origional one didnt it makes me think a sensor is bad. The bad sensors false reading haveing is skewed closer to what it needs to run by changeing the map. Like if a maf volts is off putting a diffrent maf cal may make the car start where it didnt before.

 

One bad spark plug would not keep the engine from running