Re: Chugging engine...

Posted by fred kanter On 2010/11/16 21:09:30

Check to see that the choke butterfly moves freely, overchoking can occur if it does not open smoothly. To free it up, spray the butterfly shaft and all linkage with WD 40 , Liquid Wrench etc

Check to see that the choke butterfly is closed when the engine is cold and fully open when warmed up.

If there is a needle and seat problem causing flooding you will be able to see gas dribbling in when you remove the air cleaner with the engine running.

A "chugging" sound at idle can also be caused by a leaking exhaust manifold either where it meets the block, the joint with the exhaust pipe or the worn bushingsa at the shaft ends of the heat riser.

To locate the sound which can be very elusive, take a length of vacuum hose about 3 feet long adn put one end to your ear. Move the other end around to the suspected areas of a leak, you'll be able to pinpoint it easily.

Fred Kanter
Kanter Auto Products
Boonton NJ