Knocking (detonation), HCH II, 2009
 

Hi folks,
Recently I have noticed that engine knocks during light acceleration. If I press accelerator and ASST starts help - knocking stops. Some info:
- mileage 195 K km
- used gazoline 93
- engine oil IDEMITSU 0W20
- CVT oil need to be changed after 10K km
- it is time to adjust valves
- spark plugs were not changed. Staring is ok and engine works fine in low RPM.

Please, advise.
BR, Vugar

Re: Knocking (detonation), HCH II, 2009
 

If you're on the original plugs, change them NOW.

EGR valve or clogged EGR port. EGR port cleaning:

https://www.greenhybrid.com/forums/f...g-howto-30730/

Re: Knocking (detonation), HCH II, 2009
 

Thanks a lot. Will take care over the weekend.

Re: Knocking (detonation), HCH II, 2009
 

Doesn't take very long.

My symptoms were light "pinging" at cruise or very light acceleration. Added power or power removal eliminated the pinging. 2 of 4 of my ports were plugged.

It takes surprisingly little time. I used compressed air to blow everything out, and it was sufficient to dislodge the vast majority of it.

Re: Knocking (detonation), HCH II, 2009
 

I have got the same symptoms. I will buy carb cleaner these days and will clean it on Saturday.
Question:is it needed to disassemble the EGR valve to do deep clening inside?

Re: Knocking (detonation), HCH II, 2009
 

I actually did nothing to the EGR valve. Since the ports were plugged, I didn't pursue it. There's a trouble code associated with EGR function. Since I didn't get that code, I didn't do anything with it.

I don't feel good about hosing things down with carb cleaner. You're basically dumping a ton of it into the intake. Simple mechanical removal is more than sufficient.

Re: Knocking (detonation), HCH II, 2009
 

I did it. Simple removed tons of **** from EGR port. That was really easy.
Another question: how this valve works? If I remove the valve, I see two hoses there. One is square window, another is round. Is this round valve itself? Does it move inside if I push to it? Mine not, it stuck. Is it normal?

Re: Knocking (detonation), HCH II, 2009
 

I can't say for sure. I fiddled with it many months ago, and I don't recall being able to move it.

How many of your ports were actually clogged?

Re: Knocking (detonation), HCH II, 2009
 

almost all of them were blocked

Re: Knocking (detonation), HCH II, 2009
 

Whoa. I think yours was worse than mine with 220K miles.