help please

[val]

Hi there I am after a bit of help here please I have a 2002 ZZ122 R jap import having trouble with it have replaced 4 coils had injectors done changed spark plugs and tap pet cover gasket and now runs like a chaff cutter runs rough had the Ecu read and nothing shows up any suggestions please to help it run better.

 

[Muhammad Ali Khan]

How many miles on the engine. Seems like your Engine valve seat is gone. My best suggest is to do a compression test.