[W126 Coupe] hesitation on 560-another question

[Attila]

        I believe so.  I used the "official" name, since that

        is how (most) parts houses refer to it.  I am sending

        you off-list information, which should be coming your

        way momentarily.

         

 

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From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Thomas Oelsner
Sent: Tuesday, December 29, 2009 10:51 AM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] hesitation on 560-another question

 

Attila,

The repair shop specifically said the cold start valve is not working. But I
can't find it listed on any of the parts supplier lists. Is this what it is
really called or does it go by another name? 

Tom

----- Original Message ----- 

From: Attila <mailto:attila13 at bellsouth.net>  

To: 'Mercedes <mailto:mbcoupes at mbcoupes.com>  Coupes Mailing Lists' 

Sent: Monday, December 28, 2009 6:08 PM

Subject: Re: [W126 Coupe] hesitation on 560

 

 

        Try first unplugging the wires to the idle speed solenoid.

        Middle of engine, below air cleaner, shiny, with 2 vacuum

        lines (about 1 inch around) going to it.  If your idle goes

        up, it works.  If it doesn't, plug wires back in, rap on it 

with a screw-driver, a good 5 to 6 times.  See if idle changes.

Next, rap on the OVP relay.  Small box on firewall, close

to driver's side.  There are a few other wires you can dis-

connect, but It's too complicated to explain in writing.  It

could possibly be the EZl, or even the crank position sensor

(green wire) being deteriorated.  If you are close to 

Jacksonville, we can check it out.  Free. 

 


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From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Thomas Oelsner
Sent: Monday, December 28, 2009 6:35 PM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] hesitation on 560

 

Hi Gary

Where and what is the EZL? 

 

And to all others who would like to chime in...I finally took the car in for
a range of service items. New plugs, wires (rotor and cap just needed
cleaning as they are fairly new), and the idle is still rough and almost
stalled out when stepping on the gas (even when warm). Fuel pumps are good
as well as the filter, compression looks good and everything looks good on
their test equipment. He did say the cold start valve does not appear to be
working when cold. But would this explain the stalling when warm? I am not
sure if he checked all vacuum lines for clogs, breaks etc. He suggested the
dealer look at it but if I can find a good shop in the bay area that has all
the test equipment and codes AND knows these cars, that would be my
preference.  The car is originally a TX car so not all local shops have the
codes.

 

Happy Holidays to all.

Tom Oelsner 

----- Original Message ----- 

From: Gary Ensor <mailto:benzman70 at hotmail.com>  

To: mbcoupes at mbcoupes.com 

Sent: Monday, November 02, 2009 9:54 AM

Subject: [W126 Coupe] hesitation on 560

 

Check the vacuum line going to the EZL to make sure it has vacuum and is not
broken or pulled off the engine side.


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The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.


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The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.

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