How to be sure about coil pack failure?

celica00

Hi all,

I was wondering..how can you be sure, the coil packs are faulty in a car? Or only one of them?
Is there a safe way without having to replace them first and see then if it works or not?

Thanks!

wonski

In my car there are for separate coils so I can disconnect 1 at a time to see if there is any difference. If there is no difference then the coil is gone.

Not sure how safe it is for more modern, loaded with lots of electronics and sensors cars. Mine is 00 regd so i don't mind experiments on it,

listermint

It can be done with multimeter, check youtube.

Or as above, some models can be checked by removing coil for engine note change. works on E46 BMWs

celica00

My car is pre 00, 95 in fact.
How would you use the multimeter tho?
I mean what would you measure exactly? The coil packs were all measured and power goes through them.
There is basically just no spark in the spark plugs

listermint

https://www.youtube.com/watch?v=NTmFHW0WnKY

Videos are easier to demo.

Remove Coil Pack.

wonski

If you have a chance to disconnect coils separately then go for it. Make sure you check the spark plugs, too.

celica00

Fantastic video, thanks!

I can not start the car at all because there is no sparks, so the last bit of the video won't work in my case.
So my spark plugs (new ones and also old one we tested) won't produce a spark and therefore start the car.

I did measure the voltage in the coils and every single one was around 12V (like the battery).

Could I assume that it is the coils then? I think no resistance was checked, only the Voltage

burke027

If there's no spark at allots not going to bra coil pack the chances of seen one fail like that would be incredibly low. Actually I've never seen one fail like that. The problem is the ecu isn't telling the car to give a spark.
What car Is it it could be immobilised could be a relay or a fuse.
Give us the make and model and year and il help you out

joujoujou

Check fault codes as well.