Now, I've long known about Jake Brakes for larger engines, but just now I learned that small diesels also have exhaust brake valves. They're basically a butterfly in the exhaust that partially closes the exhaust pipe to create back pressure and provide engine braking.
Now my
Renault Trafic has no engine braking to speak of, but less would still be better.
Right now I'm not sure if P&G is better in gear or neutral, but this would close that gap and make it much easier to accomplish. It could possibly be wired via the brake switch to engage only when actually braking, so you'd have the best of both worlds.
It seems odd that I've never seen this mentioned on Ecomodder, so I'm wondering if other than the possible CEL, there might be any unintended consequences of removing or modding the butterfly?
My first port of call will be to just disconnect the electrical connector and see what happens.