Here's what I've noticed: When the engine is freshly started the idling goes up and down. *Take note it's not rough. A better way to describe it is that it like REVS up every 5 secs or so. It can be simulated in a tuned engine when you "press & let go" on the accelerator every 5 secs.
Someone told me it could be vacuum related. Does vacuum have something to do with the 300D's engine?
Thank you again!
85 300D 55K