2001 gc starts and then dies

[jackel440]

my 2001 gc starts and then dies after returning to idle.i tried it later and it started up fine and had the service light came on i got to codes one for the battery being unhooked in the last 50 starts which it hasn't and another for the map sensor reading voltage too high when checking barometric pressure when key on.
well then the light went out and drove fine, then this morning the same thing.it will stay running as long as you feather the throttle then it will die as soon as you let it idle.
any ideas on what this is?

[vipergg]

Originally Posted by jackel440

my 2001 gc starts and then dies after returning to idle.i tried it later and it started up fine and had the service light came on i got to codes one for the battery being unhooked in the last 50 starts which it hasn't and another for the map sensor reading voltage too high when checking barometric pressure when key on.
well then the light went out and drove fine, then this morning the same thing.it will stay running as long as you feather the throttle then it will die as soon as you let it idle.
any ideas on what this is?

Dirty throttle body and or IAC motor . Thoroughly clean the throttle body and pull the IAC motor and thoroughly clean the orifice that it sits in .

[jackel440]

Originally Posted by vipergg

Dirty throttle body and or IAC motor . Thoroughly clean the throttle body and pull the IAC motor and thoroughly clean the orifice that it sits in .

all right going to give this a shot see what happens had to wait till i got home from work to try something tried to start it and it still wont run so gonna take it apart.

[jackel440]

alright pulled out the map sensor from the intake and the nozzle part of the sensor going into the manifold had some iol residue on it i wiped it down and blew it out reinstalled it and the van fired right up.going to purchase a new sensor as i broke the clip off as its only 15 degrees outside.

[1thunder]

also make sure your battery is good if the battery is weak the pcm cannot calculate the position of the ais motor and usually results to stalling