BMW Misfire - Troubleshooting a misfire at low RPM in a 1990s BMW

Troubleshooting and fixing a low RPM misfire in my 1990 BMW E34 M5.

[@garydrawson7709]

You may want to check your vacuum lines. On startup the intake plenum resonator flap should actuate. The diaphragm on the actuator is a common problem, but updating/replacing the vacuum lines with new silicone is always a good idea. Nice car!

[@TrevorS38]

I caught that when I was doing the final edit of the video - good eye. It is funny because I did a video on the resonance flap a few years ago. I guess I get to add that to the very long list.

[@TrevorS38]

Just finished fixing the issue finally - a rodent had chomped away at the charcoal canister vacuum lines. Yikes