Modded Stock Exhaust Performance Problems!
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
Modded Stock Exhaust Performance Problems!
Hello, i recently did a secondary cat deletes and resonator was removed; it seems like my car lost quite a bit of power or it doesnt run like a beast like it used to, it seems like my c230k is faster or accelerates faster; should i put my catalytic convertor back on, or should i get a magnaflow convertor, or a flowmaster on. Please let me know; what i should do- i want my car to be fast again :/
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From: Dallas, Texas
W203 C55 and SAAB 9-3 2.0T
Not sure what you could have done to cause that. Unless your car is throwing codes (engine light is on) and it's gone into limp mode. For it to feel anything like a c230k, it would have to be running on half power for some reason.
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
Hey Austin, no codes , no errors nothing! Only thing I feel is a huge jerk when I shift from the 1st to 2nd gear , and it feels like the car doesn't pull like before, seems like it's a delay or not amusing like it used to be.
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
The jerks used to already happen, but you couldn't really tell too much, now it seems like the entire car shakes and I know for a fact it goes much slower than before? No idea why - members please help. Feels like back pressured after the mods idk
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
Not sure if you have a C32 or a C55 but neither one should give you a problem following removal of secondary cats and the resonator. Check to make sure you don't have any exhaust leaks.
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
I've got a c55 2005 , so I'm not sure if I've got any exhaust leaks? And idk how to check them? But how do I check if I got any exhaust leaks or whatever the case is; thanks for your genuine replies apperciate it.
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Thread Starter
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
02 seasor failure? But I have no check engine lights or signs that come up? So could it still be that, without any fault dash signs coming up? And removing the secondary cats they had no o2 sensors in it.
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2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
o2 sensor failure would give you a CEL for sure. Check all the welds to make sure you don't have any exhaust leaks. That is the only thing I can think of that is related to the changes that you made.
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Thread Starter
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
Hey insame, I've read some threads before they are saying it could possibly be a bad solenoid valve, or the throttle control? Or some bad maf sensors? What do you think.
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From: Dallas, Texas
W203 C55 and SAAB 9-3 2.0T
Without it throwing codes it's going to be a really hard call on almost all those you've listed. MAF might be causing it, I remember w210 E55's having that issue a lot and the symptoms are very similar, minus the shifting issues.
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05 c55 silver, 98 Imperial Red C43
I dont think 02 sensors always throw codes.
I would start with disconnecting the battery for 15 minutes then take it for a good drive on the freeway.
Maybe the ecu needs to reset it self to get used to a different kind of exhaust
I would start with disconnecting the battery for 15 minutes then take it for a good drive on the freeway.
Maybe the ecu needs to reset it self to get used to a different kind of exhaust
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W203 C55 and SAAB 9-3 2.0T
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
Hey austin; I did like 2 weeks ago, so it kind of worked for couple of days, just resetted the throttle doing those steps and it felt good, now its back to what it was, I wonder if I should sell my car or if anyone has any other steps. Cheers
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2023 E450 Cabriolet, 2019 F150 Platinum, 2014 Dodge Challenger R/T
Be patient, lots of good tech folks on here.... but it will certainly take longer with no codes for hints at what your issue is....
So after the exhaust changes you reset the ecu and it worked for a few days ?
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
Thanks for the positive vibes, I just want my c55 running like a beast like it used to lol; this is upsetting me :/ - basically I reset it by turning the ignition and pushing the gas all the way down for like 15-30 secs and it resetted. And it ran good for couple of days and now it feels a bit sluggish
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From: FLORIDA
2005 c55, 2005 c230, 2004 e55, 2007 e63
Alright I'll definitely reset the battery and see if that works okay, and you think I'll need my radio code? After resetting my battery because I know for some mercedes I've had in the past I needed it.
thanks
thanks
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05 c55 silver, 98 Imperial Red C43
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From: new zealand
C55 AMG
C55 mods
Hello, i recently did a secondary cat deletes and resonator was removed; it seems like my car lost quite a bit of power or it doesnt run like a beast like it used to, it seems like my c230k is faster or accelerates faster; should i put my catalytic convertor back on, or should i get a magnaflow convertor, or a flowmaster on. Please let me know; what i should do- i want my car to be fast again :/
