You don't manually adjust an automatic choke. If your Blazer is experiencing cold-start problems, the issue is *not* likely a need for choke adjustment. Instead, the problem lies with one or more of these components:
* Faulty choke thermostat: This is the most common culprit. It's the part of the carburetor that controls the choke plate based on engine temperature. It might be stuck or malfunctioning.
* Vacuum leaks: Leaks in the intake manifold or vacuum lines can affect the operation of the automatic choke system.
* Carburetor problems: The carburetor itself might be dirty, clogged, or require rebuilding/replacement. This is a more complex issue.
* Fuel delivery problems: Problems with the fuel pump, fuel filter, or fuel lines can prevent sufficient fuel from reaching the carburetor, making it difficult to start.
Troubleshooting steps if your Blazer has cold-start issues:
1. Check for vacuum leaks: Inspect all vacuum lines connected to the carburetor and intake manifold for cracks or loose connections.
2. Check the choke operation: Observe the choke plate while cranking the engine. It should close initially and gradually open as the engine warms. If it's not moving or closing fully, the choke thermostat is likely the problem.
3. Have the carburetor inspected/serviced: A professional mechanic can diagnose carburetor issues and perform necessary cleaning, repair, or replacement.
4. Consider a fuel system check: Rule out problems with the fuel supply.
In summary: You don't adjust a choke on an '88 S-10 Blazer; you troubleshoot and repair the automatic choke system or other related components if there's a problem with cold starting. Attempting to manually adjust something you shouldn't could damage the carburetor. A mechanic will be best equipped to handle this.
