For the past month I noticed that my truck's engine doesn't idle (rough, engine shakes alot) right when stopped and in Drive, if I shift to Neutral the idling improves, the shakes are gone. I did replace the engine mounts a couple of weeks ago but that didn't improve things.

Since it's a bit cold here I haven't really got under the hood but I need to soon. Where would I start looking for the cause?

Thanks for you input!!

gcinque
03 Tacoma Xtra cab 4cyl 5spd
89 4Runner/Jasper reman 22RE/Auto SOLD
98 Tacoma Xtra cab 4cyl Auto SOLD