[W126 Coupe] hesitation on 560-another question

[Josh Allen]

Tom,
They might have been talking about the cold start injector, but I'm not 
absolutely sure of the proper name.   It is a valve of sorts though, so 
that was my first thought.

-Josh


On 12/29/2009 7:50 AM, Thomas Oelsner wrote:

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

>     *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.

>

>     ------------------------------------------------------------------------

>

>     *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 <mailto: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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