I'll start of with what my 96 blazer (4x4/4.3 Vortec/158k/recent tune up. Plugs wires ect.) did too me last night. . . So I was driving had been driving for a little while maybe 20 minutes when I was coming too a stop sign I tapped my brake too slow down a bit and instead it sped up like I slammed on the gas instead. Today I get up too get my coffee and I go too shut the thing off and it WOULDN'T DIE!!! I'd like too think its just my blazers way of telling me that it doesnt want too make a pit stop and it wants me too keep driving it, however I'm proley dreaming LOL Has anyone ever had one of these problems? Should I be really concerned?