Picked up a hissing sound and truly horrible gas mileage, and of course, couldnt come at a worse time! My '63 Grumman Kurbmaster RV just finished week 2 of 5 consecutive weekends of fun.
So, I need to come up with a plan of attack so she's ready to roll next weekend!
I have traced the sound to the area generally on the left side of the intake/carburetor, leaning towards the intake as being the cause.
It is my 1st Chevy 292, and I havent been into the manifolds since Feb of last year, so I am fairly clueless.
After Google searching images, it looks like there may be a vacuum port {unused in my configuration} that may be the culprit. There does seem to be unused coolant lines {intake heat?}, but they dont fail the carb cleaner test. Something on the left side [out of sight for now] does fail...
Any other suggestions? Gonna pull off the dog house tomorrow, having any other ideas to check out would be sweet!
