Thread: still rough idle

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denny i just checked at 1500 and vacuum drops up and down by 1 ,feels like slight miss.

If you're running power brakes, and I assume you are, don't forget to check those fittings and hose as well.

Originally Posted by DennyW

Check all your connections, and around your gasket areas for vacuum leaks. A can of choke cleaner works good. Just use little squirts at different points, and watch the gauge, and listen for rpm changes. Don't forget the throttle shaft. It sure sounds like a vacuum leak. Fuel is ok, right ?

Another thing that works well for this is a small propane torch. Turn it on (with no flame obviously) and run it around the gasket areas. When the RPM's change, you've found the leaking area.

thanks for the help guys i will check out things in a week ,we have a salmon derby on right now and i am it.need a break from project.
soup

a place i tend to find that problem in the shop often is at the carb gasket, a lot of people tend to snug the carb down unevenly, or they have a spot where the carb body is in the way so the use a wrench instead of a socket and just dont get it tight....

well i did vacumm leak tests, with carb spray, propane and hand over carb no difference,no leaks ,checked exhaust {catylatic} okay there .rough idle almost seems to be timing, have slight hesitation , have to check tdc again?

checked vacumm advance and mechanical working ,new distributor from jegs
but this morning i found two plugs not firing right,changed coils and modules have new wires on ,i now suspect bad magnecic pick up or connection,buddy has another distributor will try it and let you know
soup

found problem,one wire on magentic pickup streched not full contact,broken or frayed, resolder and runs like a charm now.must not of been crimped right at factory ? thanks for input guys
soup