[lowzero]

hey guys!recently i flashed bm3 for my 535gt.i found that theres some knock in my engine.following month i cleaned the Carbon deposits in cylinders，and replaced the spark plugs with original parts.but it seem useless，there is still knock in the datelog. how can i fix it???

here are 2 logs
https://www.bootmod3.net/log?id=671f...32f364f8fdab87
https://www.bootmod3.net/log?id=672a...a92c3aa60407fd

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full exhaust，kn high flow rate filter and upgrade intercooler are equipped

[Tejas1836]

Remove the flash???

[lowzero]

Originally Posted by Tejas1836

Remove the flash???

not working still knock in stock tune

[John H.]

Possible mechanical issue/s. I would advise to have it inspected by a technician. Any codes?

[lowzero]

Originally Posted by John H.

Possible mechanical issue/s. I would advise to have it inspected by a technician. Any codes?

inspect which part？no code exists.

[Dasky_spas]

Try different fuel station/brand if you fill up at the same station. Start with the easiest variables first.

[BimmerWu]

冷车启动，开了8公里左右吧，进气温度来到了 60 度
水温油温其实是低的，不到原厂开格栅的条件
水温油温低，进气格栅不开（保温节能），高流量空滤疯狂吸机舱内的热空气，此时再走高增压低点火角的程序， 就容易爆震
我猜此时如果是原厂空滤，反而进气温度可以低一点，因为没有那么顺畅，有一个热交换

[BimmerWu]

另外可以切回原厂程序看看，对比一下

[BimmerWu]

BM3 Tech Support has helped me fix it.

Active radiator flap now can keep open when engine on.

And keep close when engine off.