After a long morning with him inspection one by one of the coilpacks, it seems like my spark plug was causing the spitting as well.
Funny how my last year workshop (no names). Sold me 4 spark plugs, and another 2 plugs different model. One with the sharp point, another with flat point. This is how screw up it gets when you trust the shop and don't see things for yourself. Pretty stupid thing to do.
So here's how it goes. Firstly the mechanic changed all the 6 coils to his working 6 ones. Then take out one by one changing with my current one, to find out which is the one that is faulty. But using his 6 working coils also causes misfire, obviously it's the plugs already. So he changed all 6 to his one as well, means 6 plugs and 6 coils from him... and it WORKS!
So I changed all 6 plugs from him, then continue to the the coils one by one. Seems like one of the coils are not really performing well at the 5k 6k rpm range, after changing it it feels better...
Second hand spark plugs cost RM100, The coils cost RM80 for one, workmanship for RM100 because of running the test one by one, and also checking my fuel pump and fuel relay installation. Kudos to this shop, for not chopping me off the price.
Posted from my blog with SteemPress : http://shadowhau.vornix.blog/2018/09/22/after-diagnosing-one-by-one-finally-its-the-sparks-and-one-coil/