04-20-2005, 08:36 AM
catalyst unit in the exhaust I mean . some time ago Steve has posted something about taking the blue co2 testing cap off in order for the catalyst to breathe; what does that mean ?Leave it off? How do I know that the catalyst was plugged or not ezxcept the funny smell ? Is this the blue cap on top of the intake manifold , my car was running extremely rich for awhile due to the vacuum leak. Replaced (packed with soot) co2 sensor after tackling the problem, but I'm wondering about catalyst it smells a little bit still - no more black smoke out of the pipe , nice smoth idle. the car is 184 k already ,would it be the time to put the metal rod thru catalyst and convert it thus into another pipe ?