I suspect a temp sensor switch isnt working and thus the car is running too rich since the computer never comes out of open loop mode.
There are only two ways that fuel can get in the oil.
1. If you have a manual fuel pump and it fails then gas can get in the oil.
2. Your vehicle has raw gas running down the cylinder walls from either a malfunctioning injector or just plain running way to rich.
Now cold engines need more gas to run then warm engines. Also the o2 sensors need to be hot to operate. The result is that the computer will run in a rich open loop mode until it gets the message that the engine has warmed up enough to go to closed loop mode where the computer will then use the O2 sensor to determine whether the engine is getting enough fuel or not. That year also uses a MAP sensor to help determine the fuel requirements and those can also go bad.
I believe that either your temp sensor came unplugged or has failed. OR perhaps your thermostat stuck open and it never really does warm up enough for the computer to start working.
Wednesday, May 26th, 2010 AT 10:07 AM