[W126 Coupe] hestation on 560-another question

[gary ensor]

Tom,

 If the cold start valve is not working it will make the car hard to start cold. The cold start valve gets power from the fuel pump relay, via a signal from engine temp. The correct name is; starting valve part number 119 070 02 46. I would check the voltage at the plug in for the starting valve with the engine cold first, and the valve only gets power while the engine is cranking over (circuit 50, starting position at ignition switch) and not in the run position (circuit 15, on position at ignition switch). 



Gary Ensor
Silverstar Motorwerks
206 Breezehill Dr.
Winchester, Kentucky 40391


 


> From: mbcoupes-request at mbcoupes.com

> Subject: MBCOUPES Digest, Vol 65, Issue 24

> To: mbcoupes at mbcoupes.com

> Date: Wed, 30 Dec 2009 12:15:26 -0500

> 

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> Today's Topics:

> 

> 1. Re: hesitation on 560-another question (Josh Allen)

> 2. Re: hesitation on 560-another question (jonathan)

> 3. Re: hesitation on 560-another question (Dan Landiss)

> 4. Re: hesitation on 560-another question (Attila)

> 

> 

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

> 

> Message: 1

> Date: Tue, 29 Dec 2009 10:42:45 -0800

> From: Josh Allen <heyallen at null-ptr.net>

> Subject: Re: [W126 Coupe] hesitation on 560-another question

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

> Message-ID: <4B3A4DA5.5050307 at null-ptr.net>

> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"

> 

> 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.

> >

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

> >

> >

> 

> -------------- next part --------------

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

> 

> Message: 2

> Date: Tue, 29 Dec 2009 19:12:09 +0000

> From: "jonathan" <jhodgman at gmail.com>

> Subject: Re: [W126 Coupe] hesitation on 560-another question

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

> Message-ID:

> <280152852-1262113930-cardhu_decombobulator_blackberry.rim.net-732323079- at bda899.bisx.prod.on.blackberry>

> 

> Content-Type: text/plain

> 

> That's the right name. CSI's only work for the first 45-60 seconds, so that is likely not the cause. 

> 

> What is history on the car? Tune up last done? O2? Fuel filter? What plugs are you running? Check for vac leaks?

> 

> Jono

> Sent from my Verizon Wireless BlackBerry

> 

> -----Original Message-----

> From: Josh Allen <heyallen at null-ptr.net>

> Date: Tue, 29 Dec 2009 10:42:45 

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

> Subject: Re: [W126 Coupe] hesitation on 560-another question

> 

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

> 

> 

> 

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

> 

> Message: 3

> Date: Tue, 29 Dec 2009 13:30:01 -0600

> From: Dan Landiss <dan at landiss.com>

> Subject: Re: [W126 Coupe] hesitation on 560-another question

> To: jhodgman at gmail.com, Mercedes Coupes Mailing Lists

> <mbcoupes at mbcoupes.com>

> Message-ID: <4B3A58B9.7020609 at landiss.com>

> Content-Type: text/plain; charset=ISO-8859-1; format=flowed

> 

> Has a sticky air meter plate been ruled out? And gross misadjustment of 

> the mixture setting? It seems to me that both of those can cause 

> problems when the throttle is suddenly tipped in.

> 

> on 12/29/2009 1:12 PM jonathan wrote:

> > That's the right name. CSI's only work for the first 45-60 seconds, so that is likely not the cause. 

> >

> > What is history on the car? Tune up last done? O2? Fuel filter? What plugs are you running? Check for vac leaks?

> > 

> 

> -- 

> 

> =-=-=-=-=-=-=-=-

> "Progress is brought about by doubt, not accord." --John Amos Comenius, 17th century educator

> =-=-=-=-=-=-=-=-

> 

> 

> 

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

> 

> Message: 4

> Date: Tue, 29 Dec 2009 22:33:31 -0500

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

> Subject: Re: [W126 Coupe] hesitation on 560-another question

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

> Message-ID: <20091230033845.671BCCF054 at mailwash11.pair.com>

> Content-Type: text/plain; charset="us-ascii"

> 

> 

> 

> 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.

> 

> 

> 

> 

> 

> _____ 

> 

> 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. 

> 

> 

> 

> 

> _____ 

> 

> 

> 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.

> 

> 

> _____ 

> 

> 

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

> 

> 

> _____ 

> 

> 

> 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 Coupes

> Postings remain property of MB Coupes, L.L.C.

> 

> End of MBCOUPES Digest, Vol 65, Issue 24

> ****************************************

 		 	   		  
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