RomRaider

On nissan maxima At 2001 having knock between 2000 to 3000RPM during wot.
How can i remove it?
Thanks a lot.


https://github.com/a33b/NissanDefs/blob ... /4y916.xml

Flash with stock bin and check for knocks

Where to get that file?

Where is your original from the car?

I changed all spark plugs, change fuel pump and also maf sensor. The car is much better than before but still when accelerating having knock. But much 50% less than before.
The problem is quality of petrol. Petrol quality is low and we need to remap most of the AT cars for removing knock.

Attachment is original file of the car.
Thanks in advance.

Copy "Regular Ignition Trim" instead of "High Octane Ignition Trim" or read your vehicle's manual.

You mean copy whole “ Regular Ignition Trim” table to “high octane trim” table?

Yes

The knock is gone but i smell smoke and also there is vibrating during accelerating when the rpm below 2000 rpm. But fuel compensation is much less than before. Do i need to add more fuel?

You need to contact a tuner to tune an intermediate option. Or study the theory and practice of self-tuning.

I am doing tunning but for chinese but not much experience about Japanese car. Thats why i am asking questions. I need guide about what to change. For example fuel tables. Thanks for helping.