verslagen1 wrote on 08/29/10 at 21:15:00:I don't think you'll find an intake leak with bubbles unless you can see from inside.
You don't think the pressure wave in the intake is strong enough to push out if there was a leak? I can feel the pulse in the rubber cap I used to plug the vacuum port. It seemed strong.
verslagen1 wrote on 08/29/10 at 21:18:32:pop on shutdown says lean.
idling faster generally means air leak.
So, by removing the vacuum line and plugging the intake to the carb I created a vacuum leak? Or just increased the symptom?
verslagen1 wrote on 08/29/10 at 21:27:58:engine braking it's quite normal to get a grumble pop.
but a shift pop is usually a exhaust leak at either the header or muffler clamp. use a candle to hunt these down. the flame will flicker.
or it could be an adjustment, your idle speed could be too low, and you compensated with idle mixture.
I'm not concerned about the engine braking pops. It's the ones that happen when I shift that I'm working to minimize.
I've looked for exhaust leaks, haven't found any. I'll check the idle speed. It's higher than it was before, maybe it was too low.
I figured out why it doesn't backfire when the choke is out. The RPMs don't drop as quickly when I close the throttle.
-D. Dwarf