Typically the cel blinks when too much raw fuel is entering the combustion chamber and not being burned. If too much fuel had got into the cylinders it may have washer down the cylinders causeing the low compression and rough running.
I would start by pulling codes. I would shoot a litttle oil into each cylinder and see if the compresion returns. Oil probably smells pretty gassy.
Tuesday, December 25th, 2007 AT 9:34 AM