2000 fd3s Automatic. No mods. Rebuilt, post detonation. Driven 400kms and now has a rough idle below 1000rpm, both in drive and in Neutral. I have spotted some oil dripping down onto the exhaust so will chech that out tomorrow but any ideas on the rough idle?

 

Have you check the obvious things like loose ignition cables or fouled plugs.

 

Will start off with those tonight, thanks.