Where is the adjustment screw located on a 1983 Oldsmobile cutlass supreme carburetor?

The exact location of the adjustment screws on a 1983 Oldsmobile Cutlass Supreme carburetor will depend on the specific carburetor model installed. Oldsmobiles of that year used Rochester Quadrajet carburetors most commonly, but other models are possible (e.g., a Carter).

For a Rochester Quadrajet: There are several adjustment screws, but the most commonly accessed are:

* Idle Mixture Screws: These are usually located on the sides of the carburetor, often near the base. There will be two, one for each side of the carburetor (left and right). They are usually small, Phillips head screws. *Access may be hindered by linkage or other components.*

* Fast Idle Screw: This is usually located on the throttle linkage. It controls the engine speed when the choke is engaged.

To find them:

1. Locate the carburetor: It's on top of the engine.

2. Carefully inspect the carburetor body: Look for small screws on the sides, near the base, or on the throttle linkage. They are often recessed slightly.

3. Consult a repair manual: A shop manual specific to your 1983 Oldsmobile Cutlass Supreme will have diagrams showing the carburetor's components and the location of the adjustment screws. This is the best and most accurate way to locate them.

Caution: Adjusting carburetor screws incorrectly can significantly impact engine performance, fuel economy, and emissions. Incorrect adjustment can even damage the engine. If you're not experienced with carburetor adjustment, it's best to seek professional help from a qualified mechanic. Incorrect settings can lead to lean conditions (too little fuel) which can cause severe engine damage.