e63s exhuast valves - loss of power/boost
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Newbie
Joined: Feb 2013
Posts: 5
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2018 e63s
e63s exhuast valves - loss of power/boost
Hello.. recently purchased a used 2018 e63s with performance exhaust. Previous owner said the car has a stage 1 tune, which I have a receipt for so believe it is tuned, however the shop it was tuned at is no longer in business. After some searching I believe I am experiencing a loss/limitation of power due to the exhaust valve issue. Car seems to be limitng HP/torque at about half and boost about the same.
Investigating the valves;
1) with engine off - the drive side is wide open, passenger side is just cracked slightly
2) with the performance exhaust valve activated at idle, both are open slightly and can hear a difference from open to closed in the exhaust sound
My question I am looking for some guidance on is should both valves be fully open when engine is off? The passenger side valve seems to try to open 3 times then gives up when the car is shut off.
Second question - the tune seems to have lots of pops and crackles (which I am not a fan of) - if taken to the dealer for service (i need to order a spare key + oil change) and they perform a software update will that revert the tune back to stock? Other option is tune shops wanting to charge $400-$800 CAD to return the tune to stock or modify tune to eliminate the popping. Personal preference, but love the throaty acceleration sound, hate the deacceleration popping/back firing sound.
Thanks for any help.
Investigating the valves;
1) with engine off - the drive side is wide open, passenger side is just cracked slightly
2) with the performance exhaust valve activated at idle, both are open slightly and can hear a difference from open to closed in the exhaust sound
My question I am looking for some guidance on is should both valves be fully open when engine is off? The passenger side valve seems to try to open 3 times then gives up when the car is shut off.
Second question - the tune seems to have lots of pops and crackles (which I am not a fan of) - if taken to the dealer for service (i need to order a spare key + oil change) and they perform a software update will that revert the tune back to stock? Other option is tune shops wanting to charge $400-$800 CAD to return the tune to stock or modify tune to eliminate the popping. Personal preference, but love the throaty acceleration sound, hate the deacceleration popping/back firing sound.
Thanks for any help.
Thread Starter
Newbie
Joined: Feb 2013
Posts: 5
Likes: 0
2018 e63s
for anyone who may come across this.. my valve was stuck, indy shop coded out the valves to be always open and I'm back to full power again. Pretty cheap fix, and no more having to press the performance exhaust button. Only downside is no more quiet mode. EUC was reset to stock and no more popping and crackling.
Member
Joined: Dec 2014
Posts: 218
Likes: 72
From: New York, NY
2018 E63S AMG
Question for you, in my exhausts, one side is stuck fully open and the other is stuck about 1/2 way open.
The car drives fine but I am thinking of removing the mufflers. Has anyone done this and what would the correct steps be. I read that you need to relocate the actuators, is that as simple as just zip tieing them under the car and keeping them plugged in?
I am afraid to cut the mufflers off and move the actuators then get stuck in limp mode.
Any help would be appreciated.
The car drives fine but I am thinking of removing the mufflers. Has anyone done this and what would the correct steps be. I read that you need to relocate the actuators, is that as simple as just zip tieing them under the car and keeping them plugged in?
I am afraid to cut the mufflers off and move the actuators then get stuck in limp mode.
Any help would be appreciated.
