[W126 Coupe] 1988 560 SEC loss of power

[Dean Slone]

I was taught to not let the tank get below 1/4 full because you might suck some "stuff" from into the fuel system.  But that was for American cars.  

Maybe you have something floating in your tank?

Dean
  ----- Original Message ----- 
  From: GreyGarageRuss at aol.com 
  To: mbcoupes at mbcoupes.com 
  Cc: GreyGarageRuss at aol.com 
  Sent: Wednesday, September 23, 2009 2:07 PM
  Subject: [W126 Coupe] 1988 560 SEC loss of power


  I follow this list daily and now have a problem with my 1988 560 SEC which I could use some advice on.  Twice in the last two weeks while driving my car lost power.  Each time the trips were at highway speeds and after about 1-1/2 hours of driving.  On each occasion, the fuel gage was close to the “R” (reserve tank ) level. The car lost most of its power (like running on 4 cylinders) but did not stall.  I was able to get over to the curb lane at about 15-20 mph.  I turned the ignition off  each time, waited 4-5 minutes and restarted….it then ran fine.

  I have had two mechanics look at it but no solution.  Both suggested fuel supply problems but the two fuel pumps were checked and appeared to be functioning properly.  They also suggested a fuel sensor problem but were unable to check sensor while problem was not happening.

  Other suggestions included: blockage in muffler system or catalytic converter!

  Any advice would be appreciated.

  Russell





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