i have a 95 monte carlo z34 with the 3.4 dohc motor it was running great then recently it would start fine but soon as it warms up it starts surging and stalls i changed the tps thinkin that was it but nope.also new upper and lower intake gaskets .still doin it .any help would be great.

 

I know some vehicles will surge do to air in the cooling system. Make sure you've bled all the air out of the system.