Where is number 1 spark plug on engine 1995 s-10 2.2 4-cylinder?

The firing order for a 1995 S-10 2.2L 4-cylinder engine is typically 1-3-4-2. However, there's no single universally correct answer for the location of #1 spark plug without a visual reference from your engine bay. The location varies slightly depending on the specific model and any aftermarket modifications.

To find cylinder #1:

1. Consult your owner's manual: This is the best resource. It should have a diagram showing the location of all spark plugs and their corresponding cylinder numbers.

2. Look for casting marks: The cylinder heads often have casting numbers (1,2,3,4) cast directly onto them. These will be near the spark plug wells, though they may be hard to read.

3. Use a diagram: Search online for "1995 S-10 2.2L engine diagram" or "1995 S-10 2.2L spark plug location." Many websites offer engine diagrams. Make sure the diagram matches your specific engine.

4. Trace the firing order: If you can identify one spark plug, and know the firing order (1-3-4-2), you can deduce the location of the others by following the order around the engine. This is less reliable than using a diagram or the owner's manual.

Important: Before working on your engine, always disconnect the negative battery terminal to prevent accidental shorts.