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Noisy cold start, check engine light on

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
The issue is that I was going by my US spec manual for that C230.
You are not in US correct?
So I will have to assume you have the Euro spec C230, which has different smog/emission related component.
After doing some more checking. I believe this is the secondary air pump for your C230 (picture below).
Can you confirm if that part has a tubing that goes to the intake?
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Sunday, August 1st, 2021 AT 5:17 PM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
Sir, I am from Montreal, Canada. The part you circled in red is the throttle body.
I recollect very well that the vacuum valve solenoid has three rubber hoses, one attaches to the intake manifold and two attach to the EGR valve, the one that I cleaned yesterday.I have attached the photos below.
Thanks once again.
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Sunday, August 1st, 2021 AT 6:04 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

I noticed it has been a couple of days since you have been contacted. Has any progress been made? We are interested in knowing.

Let us know what we can do to help.

Joe
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Tuesday, August 3rd, 2021 AT 10:54 PM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
Hi Joe, I am basically waiting for a reply from your part. I was asked to clean the vacuum valve on the intake side of the manifold, but I don't see any valve. Please direct me, thanks in advance.
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Wednesday, August 4th, 2021 AT 1:19 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

No problem. I read back through the threads and found a picture that you sent us. I copied it and attached it below. That is what you are looking for.

Joe
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Wednesday, August 4th, 2021 AT 10:10 PM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
Hi Joe, I have cleaned the EGR valve and the check engine light came back after 20km.I don't see the actuator valve on the intake manifold. Please your direction is highly appreciated.
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Thursday, August 5th, 2021 AT 12:51 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
That valve is a back pressure valve, not an actuator.

The EGR gets carbon up on the shaft and you cannot access it for cleaning. The only way is to replace the valve.

Roy
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Saturday, August 7th, 2021 AT 5:52 PM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
Thank you Roy, I will change the EGR valve and let you know the outcome. Have a blessed Sunday.
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Sunday, August 8th, 2021 AT 3:38 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Sunday, August 8th, 2021 AT 4:28 PM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
Hi Roy, I replaced the EGR valve and after 32 km of driving the check engine light has come back. Please, waiting for your expert opinion.

Vivek
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Thursday, August 26th, 2021 AT 5:20 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Is the valve being commanded open?
You can heck by accelerating the throttle from under the hood and see if the valve opens and closes.

Roy
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Friday, August 27th, 2021 AT 4:55 AM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
Thanks Roy for reply. Please Roy let me know as to how to check the opening and closing of the valve on acceleration. Thanks in advice.
Vivek
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Friday, August 27th, 2021 AT 4:29 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
When you raise the engine RPM, the valve should open and close depending on the load.

Roy
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Friday, August 27th, 2021 AT 9:13 PM
Tiny
VIVEKHB
  • MEMBER
  • 89 POSTS
I didn't get exactly what your saying Roy, but I will try and come back to you. Thanks once again Roy.
Vivek
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Sunday, August 29th, 2021 AT 9:43 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Roy
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Sunday, August 29th, 2021 AT 9:55 AM

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