Sudden Loss in Acceleration
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Newbie
Joined: Oct 2004
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From: Cincinnati
CLS55 AMG
Sudden Loss in Acceleration
With 5600 miles, my CLS 55 appears to have lost substantial power. At speed, it won't kick down when accelerating. It is not possible to have wheel spin from a standing start (with ESP off). I would estimate a 0-60 time of ~9 seconds. Has anyone else experienced such a problem? The car goes in the shop early next week.
Glen
Glen
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From: Encino
'06 CLS55 AMG
Your supercharger might not be engaging. The supercharger is engaged by an electro-magnetic clutch and as another member suggested, you may be having a heat issue which would cause the system to prevent S/C engagement. If the system gets too hot and the S/C cant engage, its essentially like driving a normally aspirated V8 with a big piece of equipment (S/C) blocking airflow so it would be especially slow.
Thread Starter
Newbie
Joined: Oct 2004
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From: Cincinnati
CLS55 AMG
Thanks for the thoughts. I also believe that the supercharger is not engaging. Not sure about the heat thing as the issue occurs at start-up with a cold engine (not that I mash the pedal with a cold engine). Hopefully, it is a quick and permanent fix.
Glen
Glen
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From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
With 5600 miles, my CLS 55 appears to have lost substantial power. At speed, it won't kick down when accelerating. It is not possible to have wheel spin from a standing start (with ESP off). I would estimate a 0-60 time of ~9 seconds. Has anyone else experienced such a problem? The car goes in the shop early next week.
Some say ECU can shut down supercharger if it feels driving has become erratic and is jolted a certain way (think that is bunk though).
If it is constant and does not go back to normal, usually a sensor. All these sensors have to play nice or the whole system gets out of whack. Most likely will pop in a new one somewhere and you'll be up and smoking.
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From: St George Utah
2017 SL63
Originally Posted by Glen55
As for the gas suggestion ("check the gas"), it must be good gas - I paid $3.40 per gallon!! 
They had a tanker driver (idiot) top off their underground tanks (where we fill) with 10-40 motor oil. Loss of power was our first immediate issue. As the oil did not combust it was forced past the rings and into the crank. As the crank filled, the motors would start to smoke and sputter, limp in. We were draining 16 quarts of oil out! Holds 7 tops.
Good gas is a wonderful thing. But it is not hard to get shbaditty gas as well.
And as an after thought you might have a plugged fuel filter...as a result of shbaditty gas
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Originally Posted by Glen55
With 5600 miles, my CLS 55 appears to have lost substantial power. At speed, it won't kick down when accelerating. It is not possible to have wheel spin from a standing start (with ESP off). I would estimate a 0-60 time of ~9 seconds. Has anyone else experienced such a problem? The car goes in the shop early next week.
Super Member
Joined: May 2004
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From: USA
LS7 powered Corvette
Originally Posted by Grumpy666
Don't forget the infamous IC pump problem.
Thread Starter
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From: Cincinnati
CLS55 AMG
All is well again - the supercharger is doing its thing. The service department ran diagnostics and found two fault errors - Code P2006-008 (Fuel Pressure Sensor) and Code P2075-002 (Charcoal Canister Valve). They performed tests on both and found no problems. After resetting the diagnostics, the supercharger worked fine. Apparently, whenever certain fault errors are detected, the computer shuts down the turbocharger.
Now it's a wait and see game. Was this an isolated incident or will the fault errors continue to occur? Stay tuned.
Glen
Now it's a wait and see game. Was this an isolated incident or will the fault errors continue to occur? Stay tuned.
Glen
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Joined: Aug 2005
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From: St George Utah
2017 SL63
Originally Posted by Glen55
All is well again - the supercharger is doing its thing. The service department ran diagnostics and found two fault errors - Code P2006-008 (Fuel Pressure Sensor)
Change the fuel filter!!!
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From: USA
LS7 powered Corvette
Those two codes are related to the EVAP purge system and it is an emission component just designed to detect leaks in the fuel system to prevent unburned HC's from entering the atmosphere. They shouldn't effect the supercharger, none of the emission equipment will be utilized under WOT driving. Those codes come up every now and then, but most of the time they pass the leak test.
