[shorod]

Welcome to the forum!

Have you checked the throttle plate operation to make sure it operates smoothly and freely? Have you checked that the floor mat isn't somehow interfereing with the accelerator pedal operation? How about the throttle cable, is it routed properly and not hanging up?

How high are the rpms getting? It seems odd that the brakes won't hold it unless you have a serious vacuum leak that is causing the power brake assist to not provide assist. When the engine speed increases, is it constant or is it cyclic? What do you have to do to get the rpms back down?

-Rod