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Do you have any idea how to adjust the air/fuel mixture and also the location of oxygen sensor on tb45e?

The first three plugs are filled with black soot (like powder) that can be remove easily.

Thanks Paul, I tried to adjust the tps, it only affects the idle speed. I want to add more, this vibration at certain rpm (at idle) is appearing when the engine is hot, the hotter the more vibration.

http://www.nissanpatrol.com.au/forums/forumdisplay.php?21-DIY-Mechanical-and-Manuals

I cannot find anything specifically for tb45e. I have the supplement VII that mentions about tb45e has only...

Thank you Paul, I am planning to replace the TPS by myself. Is there any proper procedure to do this or just replace and test?

Thank you guys for the warm welcome. Plugs 1, 2, and 3 are filled with black/burned sooth, it look like too much gasoline. I consume more gasoline.
Less power with engine already roaring.

I have a 2001 tb45e, at idle it is vibrating at certain rpm, already replaced plugs and cables but still the same.

Thank you very much.