I recently bought a 2000 Ford Ranger V6 3.0 and today when I filled up the tank and went through the car wash, I left and drove down the street like normal. When I pressed in the clutch and pressed the brake I seen the gauges drop and the cluster lights come on. Every so often of pressing in the clutch and pressing the brake to down shift(about to make a turn or coming up to a light about to change) the engine would cut off. The day I bought this truck the dealership had a new clutch put in it. It has a fairly new fuel filter and ive checked the inertia switch. Ive read around on the forums and google and they've all said it could be IAC, fuel pump, vacuum leak at the brake booster, or fuel filter. If anybody could help me and give me a general direction of how to fix this, that would be greatly appreciated. I also work in a shop but im a level 1 mechanic, so im still learning and gaining knowledge!