However, if you're determined to try it yourself, understand this comes with significant risk. Here's a *general* overview, but it's *not* a substitute for a factory service manual specific to your car's carburetor (Rochester Quadrajet is likely, but not guaranteed). Always consult your vehicle's service manual.
Before You Begin:
* Safety First: Disconnect the negative battery terminal to prevent electrical shorts.
* Gather Tools: You'll need screwdrivers (Phillips and flathead), adjustable wrenches, a vacuum gauge, and potentially a tachometer. A service manual will specify the exact tools needed.
* Identify Your Carburetor: Knowing the exact carburetor model is crucial. A Rochester Quadrajet is common, but other types might be installed.
* Cleanliness: Work in a clean area to avoid contaminating the carburetor.
General Adjustment Steps (For Rochester Quadrajet, This is highly generalized):
1. Idle Mixture Screws: These are typically located on the sides of the carburetor. They control the fuel/air mixture at idle. Do not adjust these without a vacuum gauge. The proper procedure involves slowly adjusting them while monitoring the vacuum gauge to find the highest vacuum reading (usually indicates the best fuel mixture). Small adjustments are key. Your service manual will detail the specifics.
2. Idle Speed Screw: This screw controls the engine speed at idle. Adjust this screw to set the idle speed according to the specifications in your service manual.
3. Fast Idle Cam: This mechanism increases the idle speed when the engine is cold. Adjust this according to your service manual to ensure proper warm-up.
4. Throttle Linkage: Ensure the throttle linkage is properly adjusted and isn't binding or sticking. This affects throttle response.
5. Choke: The choke controls fuel delivery when the engine is cold. Ensure the choke operates properly. This often involves a manual adjustment.
6. Fuel Level: Incorrect fuel level in the float bowl can lead to poor performance. Your service manual will explain how to check and adjust this critical aspect.
Important Considerations:
* Vacuum Gauge: This is essential for accurate idle mixture adjustment.
* Service Manual: You absolutely need the service manual specific to your 1985 Oldsmobile Eighty-Eight. It will provide precise adjustment procedures and specifications.
* Emissions: Incorrect carburetor adjustments can drastically increase your vehicle's emissions.
* Fuel Economy: Improper adjustments will negatively impact your fuel economy.
Disclaimer: This information is for general guidance only. Attempting carburetor adjustment without the proper knowledge and tools can result in engine damage or injury. Seek professional help from a qualified mechanic. They have the experience and tools to properly diagnose and adjust your carburetor. The cost of a professional adjustment is far less than the potential cost of engine repair.
