Quick Answer: Can the wrong spark plug damage the engine?

If the electrodes are broken off or flattened, it is likely that the wrong spark plugs are installed. A spark plug that is too long can cause extensive damage to your engine while a short spark plug can cause poor gas mileage and spark plug fouling.

Will a car start with the wrong spark plug?

To answer your question in one word – YES, the wrong spark plugs or incorrect spark plug gap can and often will cause a vehicle’s engine to misfire or run incredibly inefficient. … Misfiring issues could be related to a faulty coil, bad plug wires, even fuel injection issues.

Can a bad spark plug hurt your engine?

Failing spark plugs can cause the car engine to misfire and thus affect its performance. … It can result in incomplete combustion and damage to the catalytic converter of the car. Starting Trouble. Faulty spark plugs can cause the car to exhibit starting troubles.

Can I use 2 different brands of spark plugs?

The engine won’t know the difference. All spark plug manufacturers cross-reference their plugs with other brands so their brand can be interchanged with other brands. … They may not have a plug with the correct electrode configuration, reach or heat range.

How do I know if my spark plugs need changing?

What symptoms may indicate my vehicle’s spark plugs need replacing?

  1. Rattling, pinging or “knock”-like noises. When spark plugs begin to misfire, you may notice unusual noises from the force of the pistons and combustion not working properly. …
  2. Hard vehicle start. …
  3. Reduced performance. …
  4. Poor fuel economy.
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What causes engine to stall at idle?

Stalling problems trace back to three primary causes: a lack of fuel, not receiving enough air, or insufficient power. Common reasons include an empty gas tank, a faulty fuel pump, a bad ignition coil, fouled spark plugs, water in the fuel, or a failing sensor. An engine stall is never fun.

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