What causes the spark plug to jump the gap?

Ignition coils, coil packs, and spark plug wires transmit a very high voltage to the spark plug which enables electricity to jump the gap. If the insulation on these components has worn away, they may be unable to produce a consistent high voltage output.

What happens when a spark plug goes bad?

If your ignition coils or spark plug wires have gone bad, you will experience similar symptoms to having bad spark plugs. Ignition coils, coil packs, and spark plug wires transmit a very high voltage to the spark plug which enables electricity to jump the gap.

When do you need to replace spark plugs?

If you haven’t replaced the spark plug wires in more than three years, your wires may be worn. Also, check your car owner’s manual or vehicle repair manual for the interval schedule for the spark plugs. Your may need to service (gap check and adjustment) or replace the plugs.

Where are the spark plugs on a Chevy 350?

In 1969, any Chevy vehicle could be ordered with a 350 engine. Spark plugs for the 350 engine are on the sides of the engine, outside the cylinder heads. Depending on the year of the engine, the spark plugs may stick straight out or set at a 35-degree angle.

What kind of spark plug should I get for my Chevy?

If that depth is very shallow, that constitutes a cold heat range spark plug. Besides the AC MR43LTS part number, I found several other plugs that are direct conversions including the Champion RS12YC, an Autolite 103, the Bosch +14 which is also called an HR8BC. This should be sufficient to find a good plug for your engine.

What are the spark plugs for a 350 small block engine?

The routing of the spark plug wires from the distributor cap on the engine to the individual spark plugs in each cylinder determines the sequence in which the spark plugs fire. Each of the eight cylinders on the 350 engine requires a spark at the correct time. The firing order on the 350 small block engine is 1-8-4-3-6-5-7-2.

What kind of spark plugs do I need for a champion car?

“All Edelbrock aluminum heads feature use of a 14mm spark plug with a 3/4-inch reach and a flat-gasket seat. Common spark plugs are E3 spark plug number E3.48 or Champion’s RC12YC. This is our starting point for engines under 9.0:1 compression ratios.