How to Replace the TPS Sensor in a Quadrajet Carburetor?

Answer The throttle position sensor (TPS) in a Quadrajet carburetor is located inside the body of the carburetor. It is actuated by the accelerator pump lever on the top of the carburetor. Replacement req... Read More »

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How to Replace the Quadrajet Carburetor?

Quadrajet carburetors were made by the Rochester Products Division of General Motors until 1990. These carburetors have a mixed history. On one hand they are regarded as one of the best performing ... Read More »

How to Rebuild a Quadrajet Carburetor 850 CFM?

The Quadrajet carburetor was made by the Rochester division of General Motors. It was standard equipment on many GM vehicles for over 25 years. The Quadrajet is a four-barrel carburetor with two sm... Read More »

How to Adjust the Quadrajet Carburetor?

In the 1960s, the Rochester Quadrajet carburetor was first introduced, manufactured with four barrels instead of the traditional one or two barrels. Over time, carburetors become out of tune and c... Read More »

How to Modify a Quadrajet to a Two-Barrel Carburetor?

Disabling the second set of throttle plates will effectively turn your four-barrel Quadrajet into a two-barrel, but approach with caution. The engine will use as much air and fuel as it needs; depr... Read More »