What do you set the timing at on a 1988 Chevrolet 4.3 V6?

You can't give a single timing setting for a 1988 Chevy 4.3L V6. The correct timing depends on several factors and must be determined using a timing light. There's no single degree number that will work universally.

Here's why:

* Engine Condition: Worn components, carbon buildup, and other factors affect the engine's performance and require slight timing adjustments.

* Vacuum Advance: The distributor incorporates a vacuum advance mechanism that automatically adjusts timing based on engine load and vacuum. This means the timing will vary depending on engine speed and throttle position.

* Specification Variations: Even within the same year and engine model, there might be slight differences in specifications.

To set the timing correctly:

1. Consult your vehicle's repair manual: This is the most crucial step. The manual will provide the base timing specification (often expressed as degrees before top dead center (BTDC) at idle). This is usually a starting point.

2. Use a timing light: This is the only reliable way to accurately measure and adjust the ignition timing.

3. Follow the instructions in your repair manual: The manual will detail the proper procedure for connecting the timing light, finding the timing mark on the harmonic balancer, and adjusting the distributor to achieve the specified timing.

4. Consider professional help: If you are not comfortable working on your vehicle's ignition system, take it to a qualified mechanic. Improper timing can damage your engine.

Trying to find the timing without a repair manual and a timing light is risky. The wrong timing can cause poor performance, overheating, and even engine damage.