When to change ignition coil.

[junorico24]

Originally Posted by nortonfb

Are you having issues?
What do your plugs look like?
Norton

Well the car sometimes has extended crank before it starts (sometimes).

I did get an engine light a few weeks ago which i reset by pulling the negative terminal off and putting it on.

The car can accelerate up to speed OK. But seems a bit sluggish and the mpg is down a bit.

I purchased new coils and iridium NGK spark plugs.

[tmontague]

Originally Posted by junorico24

Well the car sometimes has extended crank before it starts (sometimes).

I did get an engine light a few weeks ago which i reset by pulling the negative terminal off and putting it on.

depending the position the engine stops in, it can feel like there is an extra turnover on the next start up. I've noticed this before occasionally.

Did you pull the code from the CEL? This would help give you a better idea if it was a specific cylinder misfiring. If you haven't changed the plugs in a long time (>80,000km) then change those and see how it runs. Chances are if it was a bad coil, it would run rough. You can tell what cylinder it is by running the engine and pulling the coil off each cylinder at one time. If the car doesn't change how it runs when a certain coil is taken off then that specific coil is likely not firing properly. Better to just pull the CEL though.

The lower MPG could be a few things, I know where I'm from I've recently gone from an avg of 5.1 L/100km to 5.45 due to colder temps and change in fuel composition for the winter. Check your plugs and see how they look as well