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[Marks DTM Calib]

Question is, how are you testing them as to do it correctly you need a large gap test plug to simulate the required 30-40mm gap.

If you work on a small gap you get no indication as to if the coil is ok and can also apply to low a load to it which may damage it.

Does the same apply to my issue on an X20XEV? I tried checking the sparks with a spark plug in the end of a HT lead and a jump lead from there to the battery negative.

Yes it applies to all and the test done is not a great test sadly.

Basics are that under compression, you need mega volts to create a spark in the cylidner, at atmpsheric pressure, to simulate this you need a big gap.

You could break down a 1mm spark gap with only 1KV at atmosperic pressures.

[mick-1975]

Just to let you all know car all sorted now i changed the coil pack and it started and ticked over great . thanks for all your help on here .