18 E63s no boost 🤦‍♂️

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Jun 27, 2020 | 01:48 AM

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

18 E63s no boost 🤦‍♂️

Have had that issue for months now . Down pipes , exhaust , BOV , Weistec stage 2 tune , Meth kit and now no boost . Replaced exhaust valves from Maisrtshaft and still the same . Not sure what to do now . I have tried everything but no one know what is the problem. My local shop suggested to replace the exhaust valves actuators but I’m not sure if that would fix the issue . Anybody had the same issue and how to resolve it . By car should be pushing easy 750whp by now but unfortunately I got noting now

Jun 27, 2020 | 06:30 AM

Ralcbah

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2018 E63S

Quote:

Originally Posted by mahmoud fayad

When I had this issue, one of the actuators had gone bad, due to trying to actuate a stuck valve over and over again. Your shop may be on to something there...test the actuators for sure.

Jun 27, 2020 | 01:04 PM

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Ralcbah

When I had this issue, one of the actuators had gone bad, due to trying to actuate a stuck valve over and over again. Your shop may be on to something there...test the actuators for sure.

how to test them , I see the valves opening and closing 🤷🏻‍♂️

Jun 27, 2020 | 02:32 PM

Wolfman

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From: Land of 10,000 lakes

AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe

Maybe a problem with the wastegate actuator vacuum hoses?

https://mbworld.org/forums/c63-c63s-...-4000-rpm.html

Jun 27, 2020 | 02:39 PM

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Wolfman

Maybe a problem with the wastegate actuator vacuum hoses?

https://mbworld.org/forums/c63-c63s-...-4000-rpm.html

Mercedes will not honor it since my car is tuned , they won’t even bother look at the issue 🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️

Jun 27, 2020 | 02:47 PM

24Hours

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From: NYC area

2019 E63S wagon; 2016 Landrover Landmark

Quote:

Originally Posted by mahmoud fayad

Mercedes will not honor it since my car is tuned , they won’t even bother look at the issue 🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️

Is that surprising to anyone?

Jun 27, 2020 | 04:39 PM

Ralcbah

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2018 E63S

Quote:

Originally Posted by mahmoud fayad

how to test them , I see the valves opening and closing 🤷🏻‍♂️

Ah. How many valves does the meisterschaft have? Is there a third in the midpipe?

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Jun 27, 2020 | 07:08 PM

ItalianJoe1

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From: Miami, FL

2003 CL 600

Do you have faults for the low boost concern? Are the turbos spooling but not making boost? I have seen the intake manifolds split on some of the earlier cars, it's possible especially on a tuned car.

Jun 28, 2020 | 02:34 AM

#10

Meeru

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From: Canada

2018 GLE63S Coupe, 2018 E63s

Check below steering rack

Put the car on the hoist..
drop the steering rack below..
look for the coupler on the boost hose, it may have become lose. If so, the clamps need to be tightened.

Jun 28, 2020 | 05:04 AM

#11

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Ralcbah

Ah. How many valves does the meisterschaft have? Is there a third in the midpipe?

3 valves , they all working fine now but since I replaced them with the ones from Maisrtshaft someone told me that won’t work , they need to be the oem valves. Such a complicated issue

Jun 28, 2020 | 05:05 AM

#12

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by ItalianJoe1

no fault codes at all , I cleared the ecu and retuned it again still no boost

Jun 28, 2020 | 05:07 AM

#13

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Meeru

Put the car on the hoist..
drop the steering rack below..
look for the coupler on the boost hose, it may have become lose. If so, the clamps need to be tightened.

but what would cause them to loosen up ?

Jun 28, 2020 | 12:44 PM

#14

apsuard

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Joined: Dec 2013

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Empty

You should check your WMI kit. I have Weistec WMI and I had a boost leak from hose coming lose after install. I was only hitting around 14 lbs of boost.

I really bet that is it since we have the same kit and I had the exact same issue.

Jun 28, 2020 | 01:19 PM

#15

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by apsuard

thank you bro I’ll do that for sure

Jul 21, 2020 | 09:07 PM

#16

Mark63amg

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2018 e63 amg

Quote:

Originally Posted by mahmoud fayad

thank you bro I’ll do that for sure

any updates because I’m currently having the same issue and I also have a water meth kit

Jul 21, 2020 | 09:14 PM

#17

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Mark63amg

any updates because I’m currently having the same issue and I also have a water meth kit

yes I fixed the issue by replacing the valves but I placed them outside and welded a straight pipe they they mount originally , now all my valves open and close outside the Pipes so there no pressure . My boost is back up now with full power , it got nothing to do with my meth kit it was just the exhaust valves

Jul 21, 2020 | 10:27 PM

#18

Mark63amg

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2018 e63 amg

Quote:

Originally Posted by mahmoud fayad

how exactly did they place the valves outside because I wanna do the same To my car if it’s my valves.

Jul 21, 2020 | 10:29 PM

#19

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Mark63amg

how exactly did they place the valves outside because I wanna do the same To my car if it’s my valves.

I can post pics soon so you can do the same .

Jul 21, 2020 | 10:34 PM

#20

Mark63amg

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2018 e63 amg

Quote:

Originally Posted by mahmoud fayad

I can post pics soon so you can do the same .

When you had the issue did you have any code or anything because I don’t have any or a cel just my horse power being cut in half

Jul 21, 2020 | 10:44 PM

#21

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Mark63amg

When you had the issue did you have any code or anything because I don’t have any or a cel just my horse power being cut in half

no codes at all , just loss in boost and power

Jul 21, 2020 | 10:50 PM

#22

Mark63amg

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2018 e63 amg

Quote:

Originally Posted by mahmoud fayad

no codes at all , just loss in boost and power

what’s crazy is that I had my whole exhaust replaced by Mercedes and it was back to normal with full power and then would be on and off with losing power. And now it’s constantly at half power

Jul 21, 2020 | 10:56 PM

#23

mahmoud fayad

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18 E63S , 12 E63 , 06 SL55 , 2011 S65

Quote:

Originally Posted by Mark63amg

what’s crazy is that I had my whole exhaust replaced by Mercedes and it was back to normal with full power and then would be on and off with losing power. And now it’s constantly at half power

is your car tunned? If it’s that normal those valves go bad right away because of the heat from the down pipes , go back to Mercedes have them replaced the exhaust but u need to take it to a shop right away cut off the valves and nag them outside and weld a straight pipe on the exhaust .

Jul 21, 2020 | 11:01 PM

#24

Mark63amg

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2018 e63 amg

Quote:

Originally Posted by mahmoud fayad

yes my car is tuned dme stage 2 and thank you I’m gonna take it back to Mercedes and have them replace i just have no idea that they go bad like that

Last edited by Mark63amg; Dec 20, 2020 at 03:51 PM.

Jul 15, 2022 | 07:00 AM

#25

[Alex]

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E63s

Quote:

Originally Posted by mahmoud fayad

Mate, I'm struggling now with the same issue - massive loss of power and boost, no error codes, nothing wrong during all the test and checks. I saw your post and noticed that you said your exhaust flaps were working fine and the actuators were moving freely. Now with this post you're saying the issue was exactly in the exhaust flaps. How have discovered that is the case while obviously the actuators and flaps works just fine? I'm confused.

Thanks for clarifying this to me.

Cheers!