aviator101

I just bought a 2003 GS300. Was running great until I sprayed down the dirty engine. I let it set overnight before starting it in case something got wet that shouldn't had time to dry out. Started it and it runs like crap and has a P0303 #3 cylinder misfire code. Any thoughts?

MikeFig82

iTrader: (13)

Pull the connector off the coil packs. They may of got water inside. Also could have water down the spark plug tubes.

aviator101

Just found the water sitting in the plug areas thanks.

Mackd1418

aviator101

Got to the plugs so I figured I would change them. Shop vac worked great. Thanks.

Mackd1418

Superman60

You can also use a compressed air to blow out the water.

aviator101

Easy plug replacement. When I got down to the plugs I cleaned the whole area with degreaser and a paintbrush. Then flushed it with water and used a shop vac right away and then blew out the remaining water in the plug wells with compressed air. Worked great and turned out super clean so I didn't have any dirt or anything to fall into the plug holes when I removed them. I had some broken plug wire clips as well. I put new wires on since it has 114,000 miles on it. I sprayed down the throttle body with canned cleaner and a nylon brush while I had it out. Runs like a champ.