[W126 Coupe] Low Idle and shut off problems. 1987 560 SEC

[Jay Manek]

I just paid for mine here in the UK... around £20 GBP!


Many Thanks & Regards

Jay Manek | www.mercland.com| 07716 349949
----- Original Message ----- 
From: "Dick Spellman" <spell.yy at verizon.net>
To: <Terry at MyMBSEC.com>; "Mercedes Coupes Mailing Lists" 
<mbcoupes at mbcoupes.com>
Sent: Monday, December 24, 2007 3:08 PM
Subject: Re: [W126 Coupe] Low Idle and shut off problems. 1987 560 SEC



> Hi Terry,

>

> Having just gone through that link as a new subscriber...it does appear 

> that the service for North America is NOW free.  And the cost for the 

> world model subscription is $12.  So, I think I am owed a refund!  We'll 

> see.  In any event this is a great tool for MB owners and now that it is 

> free everyone should use it.

>

> Dick

>

> Terry Ratliff wrote:

>> Dick - I am a member of MB Club of America and as far as I know it does 

>> not

>> include an EPC online subscription. Depending on which EPC site you go 

>> to,

>> one charges a lot of money and one is available for North American cars 

>> for

>> FREE at: http://epc.startekinfo.com/epc/welcome.jsp

>> You have to enter your charge card and they hit you with $1 for

>> verification. I expect they will credit back the $1.

>>

>> Best Regards,

>> Terry C. Ratliff

>> eMail: Terry at MyMBSEC.com  Web site: http://MyMBSEC.com

>>

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

>> From: mbcoupes-bounces at mbcoupes.com 

>> [mailto:mbcoupes-bounces at mbcoupes.com]

>> On Behalf Of Dick Spellman

>> Sent: Sunday, December 23, 2007 3:58 PM

>> To: Mercedes Coupes Mailing Lists

>> Subject: Re: [W126 Coupe] Low Idle and shut off problems. 1987 560 SEC

>>

>> Hi Crystal,

>>

>> It does sound like you need to go over the fuel system, the vacuum 

>> system, and the electrics.  Fixing as you go whatever is worn or needing 

>> adjustment.  If you are inclined to do all of this yourself, you need the 

>> cd manuals plus the free Super Nervig Index that makes the manuals easier 

>> to navigate and locate things. Then if you are a member of MBClub you 

>> have free access to EPC on-line so you can see where parts are located 

>> and how they are interconnected.  If not a member ( I am not) just pay 

>> the annual fee of $20-30 to access the service as a subscriber.  Just 

>> plug in your VIN and everything specific top your car is at your 

>> fingertips.

>>

>> If on the other hand you just want to get things in good working order 

>> from a really good indy in LA, I'd look-up Steve Lemberg who runs a shop 

>> in Van Nuys as I recall.  I do not recommend too many mech's but, he is 

>> excellent and Jonathan in Atlanta is excellent and also sells MB parts 

>> plus provides some direction.

>>

>> Really depends on your appetite for fixing.  You need the manuals and EPC 

>> to get started.

>>

>> Vacuum.  Then I'd focus on the vacuum system by eliminating the 

>> peripheral vacuum sources, plugging the manifold sources off to see if 

>> you can get improved idle.  There are a number of vacuum connections on 

>> the air flow meter housing, idle air valve, to check once all other feeds 

>> are plugged off and not essential to checking the engine.  Then add one 

>> vac circuit back in at a time to see where additional the leaks are.  A 

>> $30 Mighty Vac does come in handy for this type of inspection.

>>

>> Fuel.  The easiest path is to get a set of fuel pressure gauges/hoses 

>> (about$80) and let the gauges with two hook-ups to the Fuel Distributor 

>> do all the troubleshooting step by step easily.  Any other method is pure 

>> guess work and you'll spend more money on replacing parts that may or may 

>> not solve the problem but, never really get a handle on the true issues. 

>> Inspect EHA for leaks, inspect throttle plate for carbon build-up. Check 

>> cold start valve for operation (careful on this as you need a jar and you 

>> will be spraying fuel).  Both fuel pumps, filters and accumulator 

>> (pressure damper) are in the rear under the passenger trunk area behind 

>> pass axle.  When ordering the filters be sure and order the two seals 

>> (crush washers) needed per each filter.  Still a messy job.

>>

>> Electrics. I'd pull a few plugs check their conditions, gaps.  Pull the 

>> dist. cap inspecting for carbon traces and any fine cracks on the towers. 

>> Check for pitting on the rotor tip etc.  If these items look to be in 

>> tough shape order new ones.  Plug wires if they are 100k or older just 

>> replace with a Karlynn set which is very good quality.  Other sensors and 

>> harnesses to check, there are many but, here are a few...TPS switch for 

>> idle stop circuit, engine temp sensors and harnesses.  OVP relay fuses 

>> initially.  Then check voltages per manual.

>>

>> Good luck,

>>

>> Dick

>>

>> MS. J wrote:

>>

>>> First, I have found the forum very very helpful.  But I am still a 

>>> little confused.  I am having cold start, *_low_* idle and stalling/ 

>>> shut off problems. I have read the archives re: Ignition control valves, 

>>> and checking fuel filters, relays and OVP relay.

>>>  I have searched various locations to find out what the various parts 

>>> look like, but not where to find them in my model.

>>>  When putting the car in reverse it shuts off. I concluded a vacuum 

>>> leak.  I have linked a few of the vacuum lines that were open and one 

>>> that is located behind the engine I linked up but not sure if I 

>>> connected in the right place.   To locate that one,  I had to remove the 

>>> air filter housing to reach it behind the engine, it  travels down under 

>>> fire wall area.  That seem to help the low idle a little (still way to 

>>> low) but not the shut off when in reverse, and from start up in low 

>>> idle.

>>>  I want to change the fuel filter but haven't located it yet. I am also 

>>> going to change the spark plugs,  wires and not sure if I need to change 

>>> distributor. How can I can if it needs replacing? I read that I should 

>>> check the ignition control valve, but not sure it is located.

>>>  Can someone point me in the right direction?

>>>  Crystal

>>> 1987 560 SEC

>>> Los Angeles

>>>

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>>

>> The MB Coupes Website!

>> W126 SEC Mailing List

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

>>

>>

>> The MB Coupes Website!

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

>>

>>

>

> The MB Coupes Website!

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

>