Yaris 2007, 1KR-FE valves knocking - Toyota Yaris Forums

Put-in · 11-29-2011, 02:48 AM

After cleaning fuel injectors in ultrasound bath I experience valve knocking in interval 2000-2500 revs when it's slight uphill. I assume that car don't have enough fuel in that moment bcs when I add gas knocking stops.
knocking is more noticeable when engine is hot.
So, just after fuel injectors are cleaned that knocking started, with same fuel before it was not a problem. Now is 95 octane fuel, and still knocks.
It's really annoying, can someone help please?

Bluevitz-rs · 12-04-2011, 09:28 AM

One can only guess that your injectors are now clogged and not delivering enough fuel causing a lean condition and thus the knocking you're hearing.

Put-in · 12-06-2011, 04:00 AM

I have solved a problem. The problem was in wrong oil. It was 10W40, instead 5W30. I just have changed oil and all sounds have disappear :)

11-29-2011, 02:48 AM	#1
Put-in Drives: Yaris 1.0 2007 Join Date: Oct 2011 Location: Serbia Posts: 3	Yaris 2007, 1KR-FE valves knocking After cleaning fuel injectors in ultrasound bath I experience valve knocking in interval 2000-2500 revs when it's slight uphill. I assume that car don't have enough fuel in that moment bcs when I add gas knocking stops. knocking is more noticeable when engine is hot. So, just after fuel injectors are cleaned that knocking started, with same fuel before it was not a problem. Now is 95 octane fuel, and still knocks. It's really annoying, can someone help please?

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12-04-2011, 09:28 AM	#2
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	One can only guess that your injectors are now clogged and not delivering enough fuel causing a lean condition and thus the knocking you're hearing.

12-06-2011, 04:00 AM	#3
Put-in Drives: Yaris 1.0 2007 Join Date: Oct 2011 Location: Serbia Posts: 3	I have solved a problem. The problem was in wrong oil. It was 10W40, instead 5W30. I just have changed oil and all sounds have disappear :)