Stumped once again..was in the middle of town the other day after buying oil and a fuel filter..ended up changing the fuel filter on the side of the road cause it kept on dying and acting sluggish/surging when I pressed on the gas..got that changed, and it acted fine..went out and cranked it up today and its doing the same thing. I had a buddy tell me it might be a iac valve, but other then that I don't know what it could be. I changed the fuel pump 6 months ago, cleaned out the throttle body about 2 weeks ago and the injectors were working fine then. Any ideas? This is on a 95 chevy g20 3/4 ton van with a vortec 4.3