[s-cars] Suddenly a 4 cyl S4!

[Trevor Topley]

Hi Guys,
            Trevor is hoping for some quick advice.
Cruising along in traffic at 80K my 93S4 suddenly lost power and ran
real rough, smoother and boost at higher rpm but feels as if it's
dropped a cyl.
Turned around and limped home, condition stayed the same, only 20K thank
goodness.
Popped the hood and there was a "different" hot smell, most noticeable
by the turbo, even the wife noticed it when she went thro' the garage.
I have new plugs but had never taken the top off before.
Carefully lifted it up but pieces of insulator from the ends of the bake
cyls broke off, the front 2 are still flexy but the others are hard. 3
of them spin easily.
Do they come off, can you buy new ones??
I was going to pull the plugs to look for a wet one, but maybe should
fire it up again and try disconnecting injectors to identify the bad
cylinder??
I've seen other recent discussion re miss fires and "POS?"problems but
they didn't sound quite the same. This started very suddenly while the
motor was under light load, seconds before all was fine.
That's where it's sitting still, I would appreciate some advice before I
make things worse.
Thanks in advance
                         Trevor Topley
			 92/93 S4
			 90 Miata, coming out of hibernation for monday!