[W126 Coupe] question about rough idle

[Richard K. Hallberg]

Many of us have found that the Fuel Pump Relay can cause funky stumbling 
periods, often repeatable conditions.  Try a good one from another 
similar model.  Resoldering the circuit board inside has fixed it for 
some on the forums.

Richard

On 6/8/2011 7:29 PM, Gary wrote:

> 1991 560 sec  130,000 miles        i've replace the 2 fuel pumps, fuel 

> filter, and accumulator and the fuel distributor about 8 months ago.

> 1st start of the day its ok, then out on the highway fine.  after i 

> stop for awhile and restart it begans to stumble all the time at idle 

> and takeoff.

> after being on the freeway and come to a stop it idles fine.

> so what is it?  injectors?  if it were injectors wouldn't it do it all 

> of the time?

> plug and wires, again would it do it all of the time?

> any help appreciated.

>

>

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