Engine stalls when cold coming to a stop and randomly when hot

[T_Vert]

nothing has changed on the car as far as mods go so I know it probably isn't the tune. I assume in open loop the MAF isn't used so that isn't it. I'm going to have to log vacuum to look for a vacuum leak but anyone else have any input?? Maybe I should just play w/ the tune some? Dave

[tblu92]

The car when started from dead cold will stay in open loop until the coolant temp reaches apprx 140* or hits the timer limit which is about 60 seconds. When the engine is warmed up--it will stay in open loop very briefly maybe 20 seconds.So if it is hot like you say and it has run over 20 seconds it is in closed loop----Sounds like it is weather related.more than likely the tune was on the borderline of needing some more adjustment-1st check for a vacuum leak and for all the usual suspects--If all looks well then most always you will need an adjustment in the "Desired Airflow" table --in gear---AND in the "Throttle Follower "table in-gear---In the desired airflow table you would add a % to correct dying/surging and in the throttle follower table you subtract a % to correct dying/surging----If you start getting a "Hanging idle" then you went too far and need to back them off----