I have a blazer with a stock vortech 5.7L. the other day it just sputtered out and died. It will start but as soon as it starts it revs to wot. i cleaned the maf. and the throttle body. when it does this the throttle body does not even appear to be open but, it is still revving to wot without any pressure on the gas pedal. any suggestions are appreciated. thanks

 

I found the culprit. Took a break from it and looked again found a vaccuum line disconnected problem fixed