[V8] Fueling Dilemna

[Ingo Rautenberg]

I Hope everyone had a nice holiday.  My V8 decided to throw a few  
curves.  Patient is a 93 V8 w/ 192k.  Before you start saying, "check  
the codes" - I plan on trying again, but I haven't had success trying  
it with this car (unlike the '90 and '91s).  Anyhow, the pass side  
exhaust connection sleeve before the rear axle (whose bands were  
rusted away, got pushed off the front pipe by the deep snow on the  
23rd.  Man what droning at 1600 to 1800 rpm!  Anyhow, did the quick  
fix with hose  clamps for now.  On the Christmas Eve Day, the  
following symptom:  Starts and drives fine.  Park it when warmed up  
and restart.  Now the bugger surges up and down near satlling whether  
driving or not for about 30 seconds.  Cab smell overly rich fuel  
mixture.  Then  evens out.  My guess is OXS, bad temp sensor at back  
of head, or lastly bad MAF.  Ideas?

TIA

Ingo