[W126 Coupe] Fuel Distributor

[Mister McGoo]

If there are no gasket leaks, spraying cleaner fluid along the joint with the engine running wouldn't change the idle whatsoever.  If it does smooth out for a couple of seconds, it could be [at least part of] your problem.  If that appears to be a possible cause you could gently try snugging the bolts (no force!) all around the assembly in a torque-type pattern, but yes replacing the gasket would solve that particular problem.   The rough idle could also be a number of other things like a vacuum leaks, injectors, ignition system components....  Obviously someone has already determined that the distributor is the problem.  However, these distributors DO seem to have very long lives.  -Bellamy
 



From: mbzman560 at hotmail.com
To: mbcoupes at mbcoupes.com
Date: Fri, 1 Apr 2011 13:48:12 -0700
Subject: Re: [W126 Coupe] Fuel Distributor




Thanks Bellamy- I'll give it a try this week end.  If it actually is a gasket leak, does replacing the ditributer gasket (included in the repair kit) solve the problem? 

Thanks,
Camran
91 420SEL, 1980 240D


 


From: eelploot at hotmail.com
To: mbcoupes at mbcoupes.com
Date: Fri, 1 Apr 2011 16:45:06 +0000
Subject: Re: [W126 Coupe] Fuel Distributor



One simple thing to try... With engine running and air filter cannister removed, use intake cleaner spray (or carb cleaner etc) with spray tube and squirt directly along the joints between the air intake/distributer base and the manifold connection.  If the idle changes momentarily while doing this you have a gasket leak that can be the cause rough idle.  -Bellamy
 


From: mbzman560 at hotmail.com
To: mbcoupes at mbcoupes.com
Date: Fri, 1 Apr 2011 08:28:31 -0700
Subject: Re: [W126 Coupe] Fuel Distributor



My economy gauge is working fine; the rough idle is not very bad; but noticeable while sitting at a light.  Performance Products has remanufactured ones for $699 plus the repair kit for $59.  I am not sure if that's the way to go.  It sounds like from what was mentioned if I do have a leak I may be able to just get the fuel distributor repair kit and see if that may solve the problem.  Thanks for all the replies.

Thanks,
Camran
91 420SEL 80 240D


 


From: mavris2 at comcast.net
To: mbcoupes at mbcoupes.com
Date: Thu, 31 Mar 2011 22:06:38 -0400
Subject: Re: [W126 Coupe] Fuel Distributor




Its probably the intake donuts. What's your economy gauge doing?  If is not pegged left you have a vacuum leak. 
 
Jason 

----- Original Message ----- 
From: Camran Nassiri 
To: MBZ Club 560SEC 
Sent: Thursday, March 31, 2011 1:07 PM
Subject: [W126 Coupe] Fuel Distributor

Does anyone have a fuel distributor for sale?  My 1991 420SEL idels rough and I was told it need a new fuel distributor ($2,064).  I am not sure if 560SEC fuel distributor is the same as the 420SEL; I am assuming it is.  Any help is appreciated.

Thanks,
Camran
91 420SEL, 80 240D




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