when the load on the motor get to be too much it will shut down the air 1st.
its a natural thing no fixin required. even if you get a bigger motor then it will still do it even my 454 does it.
SUNSHINE VANS-VAN DIEGO ADRENALIN BY THE GALLON & CHASIN RACIN ONE FOR THE DIRT & ONE FOR THE STREETS '93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB '92 CHEVY G30 454 BEAUVILLE EXT 146" WB