[W126 Coupe] Running rough

[Andrew Sporner]

In the words of Yogi Berrra, "It sounds like Deja Vue all over again".

Might be interesting to see how rich the various cylinders are running.

They did  a check on the monitor (measuring the Lamba sensor output)
[mine was retro-fitted with a cat] and it was well over where it should have
been and after adjusting this set-screw things became much better. (that
was after they [a retired MB mechanic and help] completely tore-apart,
cleaned and reassembled the fuel distributor.


Andy


On Fri, Jan 23, 2009 at 5:52 PM, Kelly Frink <560sec at comcast.net> wrote:

> I replaced the idle speed Control unit with a old one I had laying around

> and the car is running much better still a little rough but not stalling.

> Maybe I should buy a new one.

>

>

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

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

> On Behalf Of Andrew Sporner

> Sent: Friday, January 23, 2009 9:23 AM

> To: Mercedes Coupes Mailing Lists

> Subject: Re: [W126 Coupe] Running rough

>

> It was the little circuit board (there were some parts that were fried

> through

> the board).  The thing about the fuel distributor might have been ineptitude

> on the part of the mechanic that fixed this.  (normally does only VW).

>

> it makes me wonder if there is some special handling necessary around

> this board.  As I said, there was already problems long before the tranny

> gave up with this (Sudden idles ~ 2000 RPM).

>

> Somewhere I read I article that there has been a large incidence of

> "Cold solder joints" that are easy enough to fix if you are good with

> a soldering iron.  In my case it ended up being so badly burnt that you

> almost couldn't recognise what it was anymore.

>

>

> Andy

>

>

> On Fri, Jan 23, 2009 at 3:15 PM, Kelly Frink <560sec at comcast.net> wrote:

>> Yes my car is now stalling at intersections.  Idle regulator or idle

> control

>> valve

>>

>>

>>

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

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

>> On Behalf Of Andrew Sporner

>> Sent: Thursday, January 22, 2009 11:05 PM

>> To: Mercedes Coupes Mailing Lists

>> Subject: Re: [W126 Coupe] Running rough

>>

>> Hi

>>

>> I had mine done last year and it cost EUR 1500.  Right after the job the

>> car kept stalling at intersections.   In my case it was the idle regulator

>> which had already been showing signs of problems (sudden high idle

>> when the engine was warm) and once that was fixed the fuel distributor

>> had a problem (a couple of cylinders were way too rich).

>>

>> I think my problems were just because of the age, but it was kind of

>> quirky that the stalling at intersections happened precisely after the

>> tranny job was done.

>>

>>

>>

>> Andy

>>

>> On Fri, Jan 23, 2009 at 1:41 AM,  <DCrawford at tompkinsinc.com> wrote:

>>> I had my 84 tranney re-built about 5 years ago by a well respected

>>> independent transmission shop for $1,800.  The performance has been

>> flawless.

>>> Looks like your cost would be a reasonable figure today.

>>>

>>> Dave C

>>> 1984 500 SEC

>>>

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

>>>        From: Kelly Frink [mailto:560sec at comcast.net]

>>>        Sent: Thu 1/22/2009 5:29 PM

>>>        To: 'Mercedes Coupes Mailing Lists'

>>>        Cc:

>>>        Subject: Re: [W126 Coupe] Running rough

>>>

>>>

>>>

>>>        HI ALL

>>>

>>>        I had my transmission rebuilt :

>>>

>>>

>>>

>>>        Assembly kit transtar #k5500D-LS(B)                 $319.34

>>>

>>>        Filter-Round Type (B)

>>> $13.13

>>>

>>>        Modulator-Vacuum S(B)

> $45.15

>>>

>>>        Band-Font (B)

>>> $95.55

>>>

>>>        Trans Fluid

>>> $28.35

>>>

>>>        Reconditioned-Torque Converter                       $399.00

>>>

>>>        Driveshaft Coupling

>>> $45.19

>>>

>>>        Transmission Mount

>>> $65.32

>>>

>>>        Muffler Support

>>> $13.26

>>>

>>>        Front Drum W / Internals

>>> $119.23

>>>

>>>        Front Planetary

>>> $112.00

>>>

>>>        Labor

>>> $695.30

>>>

>>>        Tax

>>> $126.80

>>>

>>>        Total

>>> $2,077.62

>>>

>>>

>>>

>>>        How's that look to everyone .

>>>

>>>

>>>

>>>        Anyway the Transmission seems fine But the engine is running very

>>> rough it was a little rough when I had it towed off to the transmission

>> shop

>>> but now it's like Chitty Chitty Bang Bang.  Could the guys at the

>>> Transmission shop have done something Any ideas.

>>>

>>>

>>>

>>>        Thanks Kelly

>>>

>>>        Owner of the money pit aka: 1988 SEC

>>>

>>>

>>>

>>>

>>>

>>> 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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> 1/22/2009

>> 7:08 AM

>>

>> 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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>

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

>