How to Set the Idle Mixture On a Quadrajet?

Answer Before adjusting the idle mixture settings on a Rochester Quadrajet carburetor, inspect the quality of the mounting gasket. These often deteriorate over time, causing a vacuum leak that degrades th... Read More »

Top Q&A For: How to Set the Idle Mixture On a Quadrajet

How Do I Change the Gas Mixture in a Quadrajet Carb?

Changing the gas mixture of the Quadrajet carburetor is a matter of turning the fuel mixture adjustment screw counterclockwise to allow more gas into the carburetor -- or turning the screw clockwis... Read More »

How to Adjust the Idle on a Quadrajet Carburetor?

Introduced in the 1960s and still in production today, the four-barrel Quadrajet carburetor by Rochester has been used in many different General Motors vehicles over the years. Over time, it is com... Read More »

How to Adjust the Idle on a QuadraJet Carb?

The Rochester QuadraJet has been called the best device for carburetion ever invented. It has also been derided as difficult to maintain. The QuadraJet is a complicated carburetor, but it is this c... Read More »

How to Adjust Idle Screws on a Quadrajet Carb?

The idle screws on a Rochester Quadrajet carburetor fine tune the air-fuel ratio going into the engine during idle. The most common cause of rough idle quality in engines equipped with this carbure... Read More »