97 chevy p/u has dead miss when a/c is on changed fuel pump, mass air and timing synch to no avail?

engine misses when load is on engine, like the a/c. when i shut it off and restart everything seems to be ok. my mechanic has changed the mass flow sensor the fuel pump anf the timing synchronizer. engine 1 fuse under the hood will not hod a fuse and blows it as soon as key is turned on
97 chevy p/u has dead miss when a/c is on changed fuel pump, mass air and timing synch to no avail?
OK sounds to me like you have a short in you wiring .That's why you keep blowing that fuse .
97 chevy p/u has dead miss when a/c is on changed fuel pump, mass air and timing synch to no avail?
that circuit might be related to your problem. i would tackle that one first. after that i am curious if you have an idle variation when you turn on the ac.