[DiveMikey]

No, the CEL has never come on. The rough idle is more of annoyance than anything- the car runs great, especially after putting the new plugs in. I was just trying to rule out serious repair options like replacing the EGR valve, fuel filter, get the fuel injectors cleaned/replaced, etc. I also want to make sure it's not a serious issue like compression.

Now for vacuum lines, is there any way to *hear* hissing or is there a specific method for testing leaks? My simple visual inspection finds that the hoses look pretty cherry, but obviously I can easily miss something.

Also, did the clues I provide help at all, 1) car runs smooth cold and 2) stays smooth when shifting from N back to D? I'm pretty sure number 2 rules out engine mounts if I'm not mistaken.

I was considering getting the throttle body cleaned, but there's a little sticker on there that says to stay the heck away from it. Also I have already used a fuel injector cleaner bottle in the last 2,000 miles, so I probably shouldn't do that again for fear of damaging the injectors.

Thanks for your help, much appreciated.

Mahalo,

Mike