I have a 1974 Chevy C10 step side. 350 automatic with vacuum power assist brakes. I recently cleaned up all of the old vacuum lines. The line to the brakes was deteriorated by the carburetor to the point that it was leaking through the walls of the hose. So it was pulling some vacuum but wasn't right. Now I have corrected that problem, and I have the truck purring like a cheetah, but when I step on the brakes at idle, I notice the idle speed increases. Is this normal operation? Is it impending doom? Has anybody noticed this before on their truck?? Maybe I need to readjust something?
Thanks for any inputs,
ricky