[W126 Coupe] 1986 560 sec died on road

[Dick Spellman]

Pins 7 & 8 are in the fuel pump relay HOLDER. Unplug relay from holder 
and then mark with white paint the two pins which are in parallel.  It 
does not hurt to add a heavy gauge (as in 16 -14 ga with tips soldered) 
jumper to your roadside kit so you can drive temporarily if the relay 
fails.  You must remove jumper every time you shut down the engine however!

Here's a link to Steve Nervig's site where you can see a photo of the 
holder and jumper under 'fuel pressure gauge set-up'.  The write-up is 
for an M103 but, should be the same detail for the M116/117 V-8 in your 
SEC I should think.  <http://web.mac.com/dakota/Mercedes/Projects.html>

-\Dick
Beyersdoerfer wrote:

> Where are these pins 7&8?

>

> Mike Beyersdoerfer

>

> On Apr 10, 2009, at 6:40 AM, Darryl Kepler wrote:

>

>> I had the same issue with an 82, I jumped the relay as Marcus said 

>> and still no fuel pump noise, turns out I had a loose wire at the 

>> fuel pump from road debris.  Make sure when you jump 7&8 you hear the 

>> pump running.

>> Darryl Kepler 

>>  

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

>> *From:* mbcoupes-bounces at mbcoupes.com 

>> <mailto:mbcoupes-bounces at mbcoupes.com> 

>> [mailto:mbcoupes-bounces at mbcoupes.com] *On Behalf Of *Markus Meyer

>> *Sent:* Friday, April 10, 2009 8:26 AM

>> *To:* Mercedes Coupes Mailing Lists

>> *Subject:* Re: [W126 Coupe] 1986 560 sec died on road

>>  

>> You need to figure out if there is a spark issue, fuel issue, or 

>> something else.

>>  

>> 1) what exactly is it doing?  is it cranking and trying to start, 

>> meaning battery/electrics seem god, just not starting up?  or is it 

>> not cranking either?  or a weak crank? (battery, starter, coil, etc 

>> issue?)

>> 2) try taking out the fuel pump relay and jumping the pins 7&8 with a 

>> wire, does the fuel pump hum/spin?  If so, try starting it then.  If 

>> still not, try removing air cleaner and pouring some starter fluid in 

>> there, see if it starts and dies after you stop pouring fluid in - 

>> this indicates fuel issue

>> 3) check for spark if fuel checks out okay

>> 4) if all that checks out okay (good spark, fuel, etc) maybe 

>> something like crank position sensor?

>>  

>> Markus Meyer

>> mfm at meyerprobateproperties.com <mailto:mfm at meyerprobateproperties.com>

>> www.meyerprobateproperties.com <http://www.meyerprobateproperties.com>

>> Meyer Probate & Properties, LLC

>> 484-919-9762

>>  

>>

>>  

>>

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

>>     Subject: [W126 Coupe] 1986 560 sec died on road

>>     From: Neville Pearson <pearsonn51 at msn.com

>>     <mailto:pearsonn51 at msn.com>>

>>     Date: Fri, April 10, 2009 8:00 am

>>     To: <mbcoupes at mbcoupes.com <mailto:mbcoupes at mbcoupes.com>>

>>

>>     I'm new to mbcoupes. My 86 560 stalled out on road and would not

>>     restart. Usually this is furl pump relay.  I had one on hand

>>     changed and did no good.  Checked overload relay fuse it was

>>     good. Checked rotor good.  Any ideas would be appreciated.

>>     Thanks, Neville Pearson  

>>     1985 500 SEC, 1986 560 SEC, 1987 190 E, 1997 E420, 1997 S 500

>>     Coupe, 1997 S 500 Sedan        

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

>>     Rediscover Hotmail®: Now available on your iPhone or

>>     BlackBerry Check it out.

>>     <http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Mobile1_042009>

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

>>     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.

>

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

>

> The MB Coupes Website!

> W126 SEC Mailing List

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.pairlist.net/pipermail/mbcoupes/attachments/20090413/b16d8dd6/attachment.htm>