Toyota Vitz 2009 Engine Issues

[arkhan315]

Hello,
My Toyota Vitz car Model 2009 is 150,000 KM driven. It gives knocking sound when driven at a medium speed and half accelerator but when accelerator is left or pushed full, the sound got disappear. I visited the tuning agent and did full tuning, cleaned all injectors, throttle body and sensors but sound is still there.

Secondly, I was previously using 20w50 engine oil and now changed to 10w40 grade but it started smoke. Also engine oil is reducing almost half litter after 3000KM.

Kindly suggest and guide me on this.

[Xulfiqar]

First time in my life have I heard a mechanic being called a tuning agent.

[syednayl]

Hahahahahaha

[rajaatta]

Engine is severely detoriated the knock sound is not octane knock.

Replace the engine and use 5w30 engine oil viscosity.
Also mention the city

[Xulfiqar]

Seems like people are so impressed with the real estate bandwagon that everyone is agent or “ajunnt”

Next in line, clothes cleaning agency (its a local dhobi)

[sardarg]

I heard a mechanic being called a tuning agent.

across Punjab IT companies every T-D-Hary is called / addressed as Engineer, a cable clipper a rider with USB visiting to upgrade the firmware of a switch is engineer. so expect anything for an AGENT a BOND Jero Jero Shevan

[dani_kk]

I also will visit a hair clipping agent soon before eid.
Will you all also visit?

[arkhan315]

Sir, in modern era such respectable words are used. So please ignore the title and focus on issue please

[sardarg]

I was previously using 20w50 engine oil and now changed to 10w40 grade

perhaps the piston rings are giving up. 1KR-FE engine is infamous for producing smoke if wrong grade of engine oil is used. OEM recommend 5W-20 5W-30 engine oil.

Please you shall engage a workshop which can perform dry & wet compression test and provide stats for 3 cylinders in both state. also PCV valve may be clogged 1 reason for engine oil consumption.

[arkhan315]

Thanks you so much @sardarg. God bless you always jinaab

[Xulfiqar]

Ask the tuning agency to inspect each power unit for glazing, such phenomenon occurs when your organic lubing agent trans esterifies in the oil volume control part of the power head.

If its true then unfortunately the entire power pack needs to be removed, disassembled and repaired against controlled specifications of the original engineering standard.

[rajaatta]

You need to either rebuild the current envine or swap it.

[Xulfiqar]

Engine is not a smooth sounding modern word. He wont understand.