[W126 Coupe] Tune up woes

[Dick Spellman]

I removed cap and rotor and they look fine.  He's missing the inside distributor cover that sits below the rotor which I told him to order just because it has a place and reason for being there.  I'll tell you I had this same problem on a 300SE I bought last November.  It had a new mongrel cap and rotor and I had this pause on acceleration and an occasional miss at speed.  I changed up to Bosch OEM cap, rotor and plugs plus put in the same wire set this fellow now has and all was cured.

I asked about the fuel filter but he has no record of it ever being changed.  I'll tell him to add this to his list.

What do you guys think about the cap and rotor.  Re the plugs, I agree with Richard, they have to be changed to OEM.

Dick
  ----- Original Message ----- 
  From: Richard Hogarth 
  To: 'Mercedes Coupes Mailing Lists' 
  Sent: Wednesday, September 14, 2005 12:54 PM
  Subject: RE: [W126 Coupe] Tune up woes


  Sounds like fuel starvation. 
  Change the fuel filter asap to start with. 
  -Richard Hogarth



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  From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Shayegan, Richard
  Sent: Wednesday, September 14, 2005 11:49 AM
  To: Mercedes Coupes Mailing Lists
  Subject: RE: [W126 Coupe] Tune up woes


  Isn't this exactly why people say stick to the W9DC plugs?




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  From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Dick Spellman
  Sent: Wednesday, September 14, 2005 12:45 PM
  To: mbcoupes at mbcoupes.com
  Subject: [W126 Coupe] Tune up woes



  A fellow SEC type with a 500 engine had the work performed to fix a backfire problem by a local (non-MB) shop.  They installed new wire set (the brand and set-up are just fine), a new cap and rotor (both mongrel aftermarket not Bosch) and new plugs (my friend thinks they have 2 electrodes or more).



  Anyway, the car starts and runs fine but, when on the highway doing 70 or so the engine just quits momentarily and then kicks back in.  This all started 1,000 miles after the tune-up. 



  What are your thoughts on a path to diagnosing the problem? Regards,


  Dick



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