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I’ve been digging and haven’t found a solution that reflects my cars issue..hoping someone has heard of this.
The car has high miles (200k) but all wear parts have been replaced. Brakes operate as they should, no codes present, all is well, etc. I should add, ABS & DSC are (were) functioning correctly frequently tested in CO snow.
Only “mod” is a Kassel tune with downstream O2 sensors and SAP deleted.
Brake & ABS lights came on randomly while driving. Coming to a stop on dry road (no slippage) the ABS pump cycled a few times. It then did it a few other times so I figured it was probably just dying so I unplugged the pump knowing all ABS/DSC were to be disabled. Turns out you lease speedo too.
Here’s the weird part: when I got the car (pre-tune) I noticed that the throttle would hang on pretty significantly once letting off throttle. It also seems a little sluggish but thats fine by comparison. By “hang on“ I mean a full second before it stops accelerating on its own. I’ll say that again..it continues to accelerate for a full second AFTER I remove throttle input. Manageable on dry roads, snow covered can get interesting real quick.
I thought the tune aight take care of it and thought it was improved but still needed work. After chatting with Kassel, I sent the DME back for a revision. No change throttle response.
Back to the ABS pump: when I unplugged it and drove away..I now had crisp throttle response & zero hang...in short, exactly as it should be. I called Kassel and told them what I found, they suggested to start at the ABS pump/module so I did.
In prep I pulled all the wheel sensors to check and make sure they weren’t covered in whatever, cleaned off the minimal junk and reinstalled. The ABS module in mine is 2 piece: the plastic module(dry) that bolts to the distribution block(wet). Seemed like the easiest thing would be to swap the module first before replacing the distribution block and having to open/bleed the system. So, I finally found a module and swapped it with zero change, i.e. it still hangs on throttle when plugged into the ABS module. So, we’re back to being unplugged.
Seems unlikely that it would be something inside the distribution block that would cause what must be an incorrect input to the DME making it respond by hanging on the throttle. I don’t want to just start throwing parts at it, already wayyyyyyyyy over budget on rebuilding this thing Lol.
Please share thoughts or point me in a direction. Also, a BMW tech looked at it and couldn’t make sense of it but didn’t have a BMW scan tool really look. It may just have to go to the stealership..
The car has high miles (200k) but all wear parts have been replaced. Brakes operate as they should, no codes present, all is well, etc. I should add, ABS & DSC are (were) functioning correctly frequently tested in CO snow.
Only “mod” is a Kassel tune with downstream O2 sensors and SAP deleted.
Brake & ABS lights came on randomly while driving. Coming to a stop on dry road (no slippage) the ABS pump cycled a few times. It then did it a few other times so I figured it was probably just dying so I unplugged the pump knowing all ABS/DSC were to be disabled. Turns out you lease speedo too.
Here’s the weird part: when I got the car (pre-tune) I noticed that the throttle would hang on pretty significantly once letting off throttle. It also seems a little sluggish but thats fine by comparison. By “hang on“ I mean a full second before it stops accelerating on its own. I’ll say that again..it continues to accelerate for a full second AFTER I remove throttle input. Manageable on dry roads, snow covered can get interesting real quick.
I thought the tune aight take care of it and thought it was improved but still needed work. After chatting with Kassel, I sent the DME back for a revision. No change throttle response.
Back to the ABS pump: when I unplugged it and drove away..I now had crisp throttle response & zero hang...in short, exactly as it should be. I called Kassel and told them what I found, they suggested to start at the ABS pump/module so I did.
In prep I pulled all the wheel sensors to check and make sure they weren’t covered in whatever, cleaned off the minimal junk and reinstalled. The ABS module in mine is 2 piece: the plastic module(dry) that bolts to the distribution block(wet). Seemed like the easiest thing would be to swap the module first before replacing the distribution block and having to open/bleed the system. So, I finally found a module and swapped it with zero change, i.e. it still hangs on throttle when plugged into the ABS module. So, we’re back to being unplugged.
Seems unlikely that it would be something inside the distribution block that would cause what must be an incorrect input to the DME making it respond by hanging on the throttle. I don’t want to just start throwing parts at it, already wayyyyyyyyy over budget on rebuilding this thing Lol.
Please share thoughts or point me in a direction. Also, a BMW tech looked at it and couldn’t make sense of it but didn’t have a BMW scan tool really look. It may just have to go to the stealership..
