Originally Posted by Rogviler

Yeah, but if his is anything like mine then it's not really a "rough idle" we're talking about, it's a narrow window before the engine warms up where it goes bonkers and then after that it's fine. It's frustrating because the searches I've run almost all point to an engine shaking/vibration problem that happens ALL the time at idle, which I get is usually mounts and all that. My engine doesn't shake, though the whole car does when it's galloping and spitting smoke on a cold start. Nor are there any problems with power or acceleration, such as I've read you get with fuel starvation or linkage slop.

Hopefully that makes it clearer.

Also, mine started with the 3-5 seconds of this that the OP is having, but is now up to 10-20, depending on how cold it is outside and how long it's been since I drove it. And it will even do a small amount of this after I go into the grocery store for half an hour (probably the 3-5 seconds it started with originally). I'm afraid he may be in for the same fate if the mystery isn't solved. This is over about a 3-year time period for me. So it seems as if something is wearing out. I don't know, anyone ever had a glow plug relay cause this? That's about all I can think of, since it seems so tied to the warmth of the engine. But I could also see it being related to such a tiny leak somewhere that it only manifests itself when enough fuel has leaked out or air leaked in, and only seems like it's correlated with the engine warming up. That sounds exhausting to figure out.

-Rog