[JeffN]

Actually both but the 97 is doing it. Just started this am 1st time cold and it smoked like a cold diesel for about 30 secs. My mech sez it could be from being at weird angle on the car carrier.

The 92 used to do it until Sube did the heads in warranty. Can still do it rarely if left a long time and a valve is left open when it's shut off.
The 97 is also stumbling at idle in gear about 3-4 times/minute-like it's missing on one cyl oh so briefly. Injector cleaner to the rescue I hope. There was also a breather tube off on the left valve cover that we just popped back on-know what that one is? PCV?

My V10 Ford van does it on occaision but they were made to actually burn a bit of oil from new.