Re: Low boost problems -- at wits end -- HELP!

[Mike Posner <posne@cts.com>]

ps:  An easier way to r/o the wastegate is to d/c it and block the hose. 
>>If the car overboosts and cuts out, you,ve eliminated the cat and turbo
as the problem.  I went through  same  shotgun  list of possibilities on my
84 Volvo ic turbo  and Hugo, my local mentor,  correctly diagnosed
the boost problem as a clogged cat, even though Midas had tested the
cat and found it to be "ok" (no heating differential, front to rear) ie. a
clogged cat would  be cooler at the rear.  You can also test back pressure
by testing  with a long hose and adapter to the  o2 sensor plug
 or  a test plug if there is already one there, (the Volvo has one). >2psi
suggests  bad cat. (I,m not sure if that figure is on boost or at idle,
but  I,d want to see what the on boost figure is.  MP.