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Am working on Mazda premacy petrol wich i guess it gdi system coz it has a high pressure pump on it top cover camshaft.the problem is intermittent spark coils shut off.wen cranking some times i get sparks on coil number 1,3 and it's immediately change wen i cycle the key to 4 and 2 so on.no check engine light,no trouble code.mechanics who were there b4 me said the pcm is tha problem but to me i dnt think so coz if tha sometimes the pcm has the control of coils.Kindly nids help!!
Hi Cyrus, how are you brother?
I'm not familiar with the Mazda Premacy, do you have an ignition system diagram you can share with us?
Waste spark? COP?
