W211 AMG Discuss the W211 AMG's such as the E55 and the E63
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E55 lost power

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Old 05-30-2012, 01:44 AM
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2012 E63 Bi Turbo
Angry E55 lost power

Fellow owner has lost all power, can only accelerate slowly to 30mph car dies above this speed and wont accelerate at all, starts missing. Also has rattle from under car that goes away at cruise. No problems at idle.

Have done search for symptoms but no joy.

O2 sensors gone bad and no signal to ECU....?

Not blowing smoke or anything unusual.
Old 05-30-2012, 03:57 AM
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your CAT(S) are bad.
Old 06-07-2012, 04:43 PM
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2012 E63 Bi Turbo
Angry E55 lost power

Greetings all,

tests show cats/o2 sensors appear fine but a host of codes posted.

P2007
B28 (pressure sensor)
P0303
P0305
P0301
P0300
p2050
P2051
P2052
P2056

Most of these relate to misfiring cylinders 1,3, and 5

Any ideas please ?
Old 06-07-2012, 04:57 PM
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Just be happy it's not cylinder 8! Misses could be due to poor spark. Have you checked the conditions of your plugs?
Old 06-07-2012, 08:00 PM
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E55 2006 / CLS55 / S450 / Jag XKR2011
whats the mileage ?
Old 06-07-2012, 08:08 PM
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Check plugs, coils and injectors and do a compression test on each cylinder
Old 06-07-2012, 08:12 PM
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2012 E63 Bi Turbo
Thanks for suggestions guys, car has 60k miles, changing out plugs, testing coils, ignition module and checking cats.
Will keep you posted.
Old 06-07-2012, 08:14 PM
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Please do a compression test before buying any parts
Old 06-07-2012, 08:16 PM
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2010 E350, 2011 ML350, 2003 996TT
I lost power in my E55 before, also had a check engine light and a notice to visit workshop. It was caused by my supercharger belt breaking. Have you checked that?
Old 06-07-2012, 08:18 PM
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Originally Posted by BlkE55K
I lost power in my E55 before, also had a check engine light and a notice to visit workshop. It was caused by my supercharger belt breaking. Have you checked that?
Oops
Old 06-07-2012, 08:25 PM
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Belt is fine, car had extremely bad miss while attempting to accelerate. Seemed to drop into limp mode.
Old 06-07-2012, 08:40 PM
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Ya that's why, I said compression...btw did you clear the codes then try accelerating and see if it causes the CEL with the cylinder missses or is it at idle?
Old 06-07-2012, 09:06 PM
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Thanks for interest, this is a buddys car. Engine fine at idle, miss only under acceleration. I am waiting to hear about the compression tests.
Old 06-07-2012, 10:41 PM
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03 E55 AMG, 06 Harley Road King Custom 06 Ram 2500 Cummins, 97 Firebird Race Car, 88 Cutlass Supreme
Could be a dieing fuel pump/clogged filter.

Has enough pressure/volume to idle, but put it under a load and it calls for more fuel and doesn't get it = misfire. Check fuel pressure, also while under load/misfiring.


A rattle under the car would make me think cats though. You sure those aren't falling apart inside? Get it in the air and bang on the cats with your hand and listen for anything in there moving around. Could be clogging up the exhaust from coming apart. Also watch for any white/greyish debris coming from the exhaust.

Last edited by BBBSS; 06-07-2012 at 10:44 PM.
Old 06-07-2012, 10:47 PM
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Thanks for suggestions guys
Old 06-07-2012, 11:04 PM
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Is it RPM related? I ask because if you keep the shift points low vs high and do an acceleration test, wouldnt it be very easy to see if it was fuel related? youd thinkif it was a fuel issue, then going to a lower rpm would allow you to faster? Just my newbie opinion, correct me if im wrong
Old 06-08-2012, 05:34 AM
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2012 E63 Bi Turbo
After checking out all the obvious faults they went back to the original thought (thanks Desired Speeds ) and found that the cats were fried.
You guys think prices are bad in the US, a stealership here wanted 13800 USD for the replacement cat set.
Can we do away with the rear pair and only replace the front pair , thereby having a straight pipe to the rear mufflers ?
Thanks for the ideas and help.
P.S.The plugs were bad also.
Old 06-08-2012, 06:53 AM
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Sounds like a great excuse to delete the Cats all together! The plugs were most likely destroyed from the cats failing too.
Old 06-08-2012, 07:22 AM
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^^^^^^ get rid of them all
Old 06-08-2012, 10:15 AM
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2005 E55 AMG
I know in the US (I thought it was worldwide) - 8 years or 80k miles full replacement coverage of catalytic converters

you have 60k miles, it's the years i'm worried about
Old 06-08-2012, 04:22 PM
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2012 E63 Bi Turbo
Buddys car is an 03 and I doubt there would be any point in approaching the dealer here even though the car is NZ new.
We will speak with an exhaust specialist and look to doing away with them (cats) altogether as suggested.
He has a basic tune and regularly runs the car at the top end of the speed range so he may well see an improvement in performance.
Old 06-10-2012, 10:15 PM
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2012 E63 Bi Turbo
Can anyone assist with o2 sensors and aftermarket cats ??

Planning to replace the front cats with aftermarket EUROCAT supposedly designed for European cars and delete the secondary pair altogether.

Will this aftermarket CAT cause any code issues if we keep both sets of O2 sensors. ?

Is a cross pipe or X pipe necessary to replace secondary cats ?

Thanks for the help so far.
Old 06-11-2012, 12:10 AM
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Originally Posted by barlow100
You guys think prices are bad in the US, a stealership here wanted 13800 USD for the replacement cat set.
I would have asked the parts guy how he could quote me that with a straight face.

I'll sell you my cats for $8k.
Old 06-11-2012, 12:47 AM
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2012 E63 Bi Turbo
Thats why I buy my bits in the USA.

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