[W126 Coupe] Summer starting?

[Dick Spellman]

Hi Mike:

You know the drill for hard starts.  Electrics.  Plugs, wires, cap and rotor all within service limits?  Check the inside tower carbon pick-up on the cap to see if it's on it's last legs.

Fuel.  Sure would be strange to think that now that you have AC again and the fuel line chillers are back in service that you would somehow develop vapor lock.  I guess you could rule this out by operating in the heat with no AC and trying to start after a period with engine hot as you describe.  Are the injectors fairly new, how many miles on them.  Maybe run a can of BG44k in the tank to clean them up if it's been a while since you did this or if they are at the end of their life replace.

I just saw a posting from Chet, maybe give him a email direct to see if he can help out.

Regards,

Dick






  ----- Original Message ----- 
  From: Mike R. 
  To: 'Mercedes Coupes Mailing Lists' 
  Sent: Saturday, August 27, 2005 9:13 PM
  Subject: [W126 Coupe] Summer starting?


  The SEC has had a starting problem the last couple of weeks and it's been getting a little worse each week. 

   

  If it's cold, if fires RIGHT up. If it's been driven a while, up to normal temperature, it seems to not like the next start - starts, stumbles, maybe runs, no power and when it's put in gear it stumbles, quits, then may or may not start. If the car is in a garage/parking structure, it has restarted fairly easily. I rev it a couple of tims, then put it in gear and drive away. Park the hot car in the hot sun, even under the car cover and 1. it fires up but stumbles, quits, then won't start for a while or 2. it might not start at all, just crank. Several times it fired right up but had no power - putting it in gear and it stumbles and quits, then it's VERY difficult to start. Today I tried to listen for the fuel pumps but no noise. 

   

  This didn't seem to happen until I fixed the A/C and now that the A/C is cold, the car has this problem. Might be coincidence.

   

  Vapor lock or fuel pumps? Which direction should I go in troubleshooting??

   

  Later,

  Mike R.

  (702) 494-8056

   



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