Curious on a 3.0 v6 93 4 runner. ok last night i went home and pulled the vac hose off the egr valve created some self vaccuum and the motor stalled, the way its suppose to, Right? now heres were i may be confused, this morning i go out pull the vacline off the egr valve while its cold (50 degs out) and start my runner and it starts up and runs just smooth as usual. i thought it was suppose to run rough and maybe stall out when its cold? Im trying to figure out my emmisions issues it runnin hi on the hydrocarbons and on the nox also.