ok.....i finally fixed my missfire (bad wires were finally the culprit). before i suspected a vacuum leak, changed a bunch of soft vac lines, checked EVERYWHERE, changed the check valve behind the intake manifold.

anyways, now with the ignition ok, i am certain i felt a vacuum leak.....i suspect maybe the power brake check valve???

i press brake....rpms droooop....release brake.....rpms suuuurge.

so what you guys think??

 

hook up a vacum guage!

 

Could be, I've seen those check valves in the classic industries catalog for about $17.

 

nawww theyre only like 5 bucks. the ones in classic were probably "correct" for a restoration or something.

breathment...the gauge wont tell me where the leak is???

im gonna replace it for the hell of it, since it is so cheap, just checking to see if anyone knows better

 

ahh i ment to say a vaccum tester. like one of those hand pump things..