C43 PE exhaust become quite randomly
#1
C43 PE exhaust become quite randomly
For these few month, I just realized my PE exhaust become odd, most of times (around 70% of driving time) it works fine and loud enough, especially for up gear "bang", really loud.
But it will randomly quite( around 30% of driving time), I show you some cases.
1. When I do up gear aggressively, I am sure with enough high rpm, the "bang" still there, but much quite, sounds like "pu", like something block my exhaust, like phlegm stuck in the throat.
*Pops always there, and sounds normal, only bang very quite.
*If the case happen, whatever I switch between C to E to S to S+, even I turn off the car and restart, it is same, until maybe wait for half hour and restart, it will become loud again.
2. Sometimes when I driving in gear 3, rpm around 3000-4000, the exhaust sound gone for 3-4 sec(just the exhaust sounds, not bang or pops), during these 3-4 secs, the sound totally gone, and sounds like in comfort mode with PE button off. Then the exhaust back to normal.
All cases I am in S+ mode and PE button ON.
I have been monitor these case for 2 month, and go through some existing post here, oil tem is fine(93-105 °C), always use 98 oil, outside tem is around 12-20°C, no software update so I believe not software issue?
It is just very random, I can't find the any pattern of it, and I tried changed the spark plug, but issue still there.
I am 2017 C43 with PE option, no tune, everything stock.
Thanks for help!!!!!
But it will randomly quite( around 30% of driving time), I show you some cases.
1. When I do up gear aggressively, I am sure with enough high rpm, the "bang" still there, but much quite, sounds like "pu", like something block my exhaust, like phlegm stuck in the throat.
*Pops always there, and sounds normal, only bang very quite.
*If the case happen, whatever I switch between C to E to S to S+, even I turn off the car and restart, it is same, until maybe wait for half hour and restart, it will become loud again.
2. Sometimes when I driving in gear 3, rpm around 3000-4000, the exhaust sound gone for 3-4 sec(just the exhaust sounds, not bang or pops), during these 3-4 secs, the sound totally gone, and sounds like in comfort mode with PE button off. Then the exhaust back to normal.
All cases I am in S+ mode and PE button ON.
I have been monitor these case for 2 month, and go through some existing post here, oil tem is fine(93-105 °C), always use 98 oil, outside tem is around 12-20°C, no software update so I believe not software issue?
It is just very random, I can't find the any pattern of it, and I tried changed the spark plug, but issue still there.
I am 2017 C43 with PE option, no tune, everything stock.
Thanks for help!!!!!
Last edited by dxx; 07-19-2023 at 01:38 AM.
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C43 Cmac Custer (07-23-2023)
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PFL205.064 with M276.823 (Oil pump solenoid defeated)
It could sometimes glitch and like others mentioned the value might not be open even if the exhaust button is pressed and a red light is illuminated, the rest is simple just turn it off and back on again. Have that work for you OP?