metla7ef

Hello,

i have a problem with my Mustang 1993.
when i start my engine every thing is fine and the RPM around 1100.
the problem starts when i open the AC. in the beginning after open AC the RPM goes to 900, after that it starts to moving between 400 RPM to 800 RPM and then the engine stops.
I changed the throttle sensor and also idle air control, but still the problem there
does anyone have any idea why this problem happen?

Thanks
Talal

mjr46

look for a vaccum leak possibly in one of the vaccum motors for the recirculate / fresh air vent, meaning on your dial fresh air mode = norm a/c , max a/c = recirculate