I have a V6 98 T100, the engine started lagging as if it wasn't getting enough fuel, it was a like a quick stall. The engine light started blinking, so, after noticing the dash indicators were normal I pulled over to look under the hood. I didn't hear abnormal sounds so I closed the hood, got in, and the blinking was gone. The engine was still doing this lagging and when I hit 50 mph on the interstate the light went solid. Went to Schuck's did the diagnostic and got a P303 misfire code. Checked sparkplugs and their gaps they all seemed fine any ideas before I spend the $60 on a running diagnostic.