Ok so my car shorts out when the fan comes on and Idk why....if u disconnect the est it works fine...I changed out entire distributor just got new computer last night and it drove fine fan came on today and it stalled out and wouldn't start unless the est is disconnected....I do have a toggle switch for the fan could that be the problem?'

 

Do you have the fan switch wired through the fan relay? Or is it wired through the hot (12v) wire on the fan?

 

the relay with the green/white wire....well it was...I took it off a little bit after I put up this post...well the problem is definitely dealing with the fan wiring or relay some how...because once the fan came on the car went erratic and shut off...disconnected the est and it started back up it shut off and back on instantly...

 

Sounds like the idle drop is causing the stalling, or it may be electrical.

Check your IAC, and check that your fan motor turns freely and isnt starting to bind. Check for vacuum leaks and check for shorts on the wires to/from your fan relay.

Sounds more like an electrical issue to me, but we all know how these cars can be.

 

Damn gremlins....im sure its electrical if I don't find the problem by next Wednesday it's going to my gm only mechanic...he'll figure it out in by time I get home from dropping it off literally if he isn't working on another car...any other ideas of what it could possibly be?