Originally Posted by
az3579
No... We don't. Lol
Cylinder deactivation insuinuates the ability to drive with a certain number of cylinders not active. Our M54 engines do not have this feature. It's either all injectors firing (in their respective orders) or none at all (off throttle deceleration). Their transition from off to on is seamless, unlike some cars with actual cylinder deactivation, which you can sometimes feel depending on load or engine.
A rumble when first starting off could be a bad guibo or maybe diff bushings. Usually driveline related in this case, some sort of rubber failing.
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