How do I know if my ignition lead is bad?

How do I know if my ignition lead is bad?

Let’s quickly look at the common symptoms of lousy ignition cables.

1. Hard starting.
2. Engine misfire.
3. Engine hesitation.
4. Engine surging.
5. Engine rough idling.
6. Reduced engine power.
7. Check engine light.

Do I need new ignition leads?

Over time leads can see a lot of heat, current and rubbing against engine components which can all lead to wear, resulting in arcing, voltage leaking and ignition system failures. It’s important to replace your ignition leads at the sign of any wear or after around 100,000kms.

When should ignition leads be replaced?

The ignition cables on a car are made to last about 60,000 miles before they have to be replaced. In some cases, the wires will need to be replaced due to the rubber boots on the end getting damaged and now allowing for a good connection with the spark plugs.

Do ignition leads improve performance?

There isn’t any performance to be gained from spark plug wires, just better build quality, which gives you not a better spark, but rather maintains an appropriate spark for more miles/years before their performance degrades to the point of needing replacement.

Are MSD spark plug wires worth it?

5.0 out of 5 stars Excellent product. Best wires for the 5.3 LS1 that you can buy! These MSD plug wires are much nicer than any I’ve used before! They come with little labels for cylinder number (not that you need it on this motor, but a nice touch).

What size spark plug wires should I use?

Most manufacturers recommend an 8 or 8.5mm plug wire on most applications. Exceptions would be an all-out race car or a street rod where EMI/RFI suppression is not a concern, but weight and appearance are. In which case, a 5 or 7mm wire might be a better option.

Does spark plug wire brand matter?

4 Answers. There isn’t any performance to be gained from spark plug wires, just better build quality, which gives you not a better spark, but rather maintains an appropriate spark for more miles/years before their performance degrades to the point of needing replacement.