I bought an 95 sc300 a few months back. Its a great car had its problems but it was good. Ran perfect. About a month ago i was driving to work in very heavy rain ( normal Florida) and the road was underwater and I could not see it. I ran through it car cut off and I ran up a curb. Had to get pulled out. Come to find out water was in the piston and in the spark plug galley. So I got all the water out dried everything I could and started. I can get it to start with no problem but its had a really high idle every since. I went through and found the connection for the idle speed control sensor was extemely brittle and broke into a million pieces so i replaced that and no change. So far it has new air filter, maf, spark plugs, tps, new oil/ filter, 2 02 sensors and of course everything cleaned out. Still has a high idle. The ecu is fine ive already checked it and even plugged my old ecu in that has leaky capacitors but still works and no change. Sometimes I can play with tps amd it will go down but it will run like crap until it cuts off. I havent checked the timing and was planning to do ut tomorrow. ( I'll update) ive made sure every vacuum line is good. I should probably mention when I went to see if water were sitting on the cams rusting them I noticed not a single bolt on the valve covers were tight. Only hand tight. Between that a bad ecu, motor mounts that were snapped in half, and a very bad wiring job on the radio id assume this person didnt know much, or didnt care I do. Any suggestions will help. Are there Any other sensors that effect the throttle position?
I also looked at the distributor anf it seemed fine other than a bad gasket but could water short it out? The water was high enough to get inside just barely. It is lowered a little bit . It is w58 swapped but alot of janket stuff. I havent messed with the coil or the igniter could that be the issue? Could it be the valve that's under the tps got water in it and is making it slightly stick just enough to mess with the idle? Kinda my daily so any Info. Also had to pull the carpet it was rekt on the driver side. Lucky rhe passenger didnt get really any water.



helps