Thread: there is definetly a vacuum leak

Tweet

Originally posted by S19243H
im getting a little rev around the secondary throttle shaft

around the shaft,that dont mean nothing, most any carb will pick up a little if you spray the shaft. put the new intake gasket on, see what happens. when you cant find the vac. leak no where else then most of the time it will be worn valve guides, and thats hard to prove. most of the time though its just one guide thats bad and it will show up as a miss on that cylinder. with the motor running you can spreay carb. cleaner into the valve cover and if they are worn enough it will suck the cleaner into the cylinders and the motor will idle up. but thats another story.

you said you had tried a diff. carb. right?