GMC S15 Engine Runs Rough

After Driving Back From Los Angeles I Stopped To Get Gas About 20 Miles From Home After Returning To Freeway My Truck Started To Pulsate...

Had Fuel Pump Replaced,head Gasket Replaced,egr ,fuelfilter,h2o Pump,plugs/wires...runs At Get Go ,but After A While Spits & Sputters, Has A...

I Seem To Have An Issue That Has Just Appeared Recently, The Engine Misfires On At Least One Cylinder And Runs Rough After Warm Up Period....

My 1992 Gmc S15 4.3 Tbi Blazer Just Started Running Rough And Very Rich Won't Accelerate No Power. The Engine Was Completely Re Built 18k...