Black Smoke comming from exhaust at hard accelerating.
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Joined: Jul 2021
Posts: 90
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From: Manitoba, Canada
2006 CLS 55 AMG IWC, 2016 E250
Black Smoke comming from exhaust at hard accelerating.
I recently became a proud owner of a 2006 CLS 55 AMG IWC Edition, beautiful car. I've had it for about 6 months now with absolutely no issue and love it. It's got aftermarket 550CC Injectors from VRP, with a smaller SC pulley and a VRP bigger intercooler with high flow pump. And the performance is ridiculous. But recently I started to notice that on hard pulls it will Rev up but slow down when getting closer to the redline and and sometimes not reaching it at all while at the same time leaving a massive black cloud of smoke from the exhaust behind me. It does it in Comfort, Sport, Manuel, but only when accelerating hard pushing through the pedal or getting close to. It does not do it when reving in park or neutral. I also noticed that after some time driving my whole exhaust is black and the back is covered in black, I'm pretty sure it's from the black smoke the carbon being burned.
It seems to me that it is running very rich, and I mean very rich, but I don't know why it's just on hard pulls than. I cleaned the injectors and the Intake Temperature Sensor, I treated the intake with SeaFoam and through the fuel a couple of times, I'm not sure if that helped much, it looked like it did for a bit but it got back to square 1.
Can someone help me out who might know what the problem is? I don't want to have to get it checked at the dealer for 179$/h. My next steps i have planned are to clean the Mass Airflow Sensor and the the O2 sensors.
Any help or tips would be appreciated thank you.
It seems to me that it is running very rich, and I mean very rich, but I don't know why it's just on hard pulls than. I cleaned the injectors and the Intake Temperature Sensor, I treated the intake with SeaFoam and through the fuel a couple of times, I'm not sure if that helped much, it looked like it did for a bit but it got back to square 1.
Can someone help me out who might know what the problem is? I don't want to have to get it checked at the dealer for 179$/h. My next steps i have planned are to clean the Mass Airflow Sensor and the the O2 sensors.
Any help or tips would be appreciated thank you.
