what are you saying karl? that less than 3.5% CO is acceptable for an emmisions test?

cos that doesn't seem to be what jim is asking. he thinks that when properly warmed up, his idle stategy should stick around stoichemetric. and if it doesn't, doesn't that indicate a sensor failure or something?

because apart from switching back and forth around stoich., how des the ecu know what CO it's running at?

how are you measuring this jim?