Hi Mike,
Don't know what year we're talking about, but one possibility would be the
catalytic converter.  If the material inside breaks loose, it can turn
sideways and block exhaust gases at higher revs.  Check it by removing the
muffler and look inside the cat.  It's pretty obvious if it's plugged or
disintegrating.
tx,
bmc  :)

Ben McCafferty
ben@volkscafe.com

Volks Cafe
1823 Soquel Avenue
Santa Cruz, CA  95062
831-426-1244
http://www.volkscafe.com

> wouldn't rev over 3-4 k and had no go.  Kind of like 3 cylinders were
> working the fourth was on vacation.  Won't rev in any gear.
>
> I thought maybe the vacuum advance had disconnected but that looks ok.  Any
> ideas out there?
>
> TIA
>
> Mike