Chassie Malfunction Warning on Brakeboost Launch...?

meadowsdb · 02-09-2024, 05:34 PM

What's up, all!

So, on my 2020 M8 Comp I am running a set of CAI and a Stage 1 tune. The car runs fantastically. Today I attempted a brake-boost launch (NOT LC) in full M2 aggressive mode from a stop light. As soon as I tried to Brakeboost a bit at the light, I got a Chassie malfunction warning message on the infotainment screen, and the car cut power....but when I chilled out and drove normally, everything went back to normal. The message vanished and the cars drive normally now.

Has anyone else experienced this? I was told that Brake Boosting from a dig can sometimes cause an issue with the Chassie Stability system (possibly when the car tries to power through the brakes).

Thank's in advance!!!

Justao · 02-09-2024, 05:54 PM

Quote:

Originally Posted by meadowsdb

What's up, all!

So, on my 2020 M8 Comp I am running a set of CAI and a Stage 1 tune. The car runs fantastically. Today I attempted a brake-boost launch (NOT LC) in full M2 aggressive mode from a stop light. As soon as I tried to Brakeboost a bit at the light, I got a Chassie malfunction warning message on the infotainment screen, and the car cut power....but when I chilled out and drove normally, everything went back to normal. The message vanished and the cars drive normally now.

Has anyone else experienced this? I was told that Brake Boosting from a dig can sometimes cause an issue with the Chassie Stability system (possibly when the car tries to power through the brakes).

Thank's in advance!!!

Happened to me twice… other times I launched successfully… did you try to launch your car again after this warning?

meadowsdb · 02-11-2024, 12:04 PM

Yes, I tried it the next day with actual LC....it did the same thing....as soon as I depressed the brake and gas, I got an initial "Launch Control Active" indicator and then IMMEDIATELY a "chassis malfunction" warning. I let off the brake and the car SORTA launched....then after about 2 sec the computer figured everything was fine and applied full power and off we went like nothing happened.

I immediately stopped and attempted a WOT hit from a dig, with NO LC or Brake Boosting, and the car took off just fine....no warning lights.

meadowsdb · 03-06-2024, 12:31 PM

UPDATE---

The issue only seems to manifest when I am running E-30 fuel.....when I am running 91 Octane + Boostane all is well. Launches and Brakeboosting works fine....

Has anhone else had this issue?

02-09-2024, 05:34 PM	#1
meadowsdb Private 68 Rep 92 Posts Drives: '20 M8 Comp Grand Coupe Join Date: Mar 2019 Location: Los Angeles, CA iTrader: (0)	Chassie Malfunction Warning on Brakeboost Launch...? What's up, all! So, on my 2020 M8 Comp I am running a set of CAI and a Stage 1 tune. The car runs fantastically. Today I attempted a brake-boost launch (NOT LC) in full M2 aggressive mode from a stop light. As soon as I tried to Brakeboost a bit at the light, I got a Chassie malfunction warning message on the infotainment screen, and the car cut power....but when I chilled out and drove normally, everything went back to normal. The message vanished and the cars drive normally now. Has anyone else experienced this? I was told that Brake Boosting from a dig can sometimes cause an issue with the Chassie Stability system (possibly when the car tries to power through the brakes). Thank's in advance!!! __________________ Rides-- '17 M3 CP-CAI, Dinan Stg 1 '17 Camaro ZL1 (700HP) '15 Audi S4 (500 HP) '15 Charger Hellcat (1050 HP)
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02-11-2024, 12:04 PM	#3
meadowsdb Private 68 Rep 92 Posts Drives: '20 M8 Comp Grand Coupe Join Date: Mar 2019 Location: Los Angeles, CA iTrader: (0)	Yes, I tried it the next day with actual LC....it did the same thing....as soon as I depressed the brake and gas, I got an initial "Launch Control Active" indicator and then IMMEDIATELY a "chassis malfunction" warning. I let off the brake and the car SORTA launched....then after about 2 sec the computer figured everything was fine and applied full power and off we went like nothing happened. I immediately stopped and attempted a WOT hit from a dig, with NO LC or Brake Boosting, and the car took off just fine....no warning lights. __________________ Rides-- '17 M3 CP-CAI, Dinan Stg 1 '17 Camaro ZL1 (700HP) '15 Audi S4 (500 HP) '15 Charger Hellcat (1050 HP)
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03-06-2024, 12:31 PM	#4
meadowsdb Private 68 Rep 92 Posts Drives: '20 M8 Comp Grand Coupe Join Date: Mar 2019 Location: Los Angeles, CA iTrader: (0)	UPDATE--- The issue only seems to manifest when I am running E-30 fuel.....when I am running 91 Octane + Boostane all is well. Launches and Brakeboosting works fine.... Has anhone else had this issue? __________________ Rides-- '17 M3 CP-CAI, Dinan Stg 1 '17 Camaro ZL1 (700HP) '15 Audi S4 (500 HP) '15 Charger Hellcat (1050 HP)
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