overboosting (1987 5kcstq)

[Motor Sport Visions Photography]

On the way home from the QCUSA driver's school at Sears Point (my car
was just parked there, I was taking pictures) my car developed a massive
overboost problem. Perfectly drivable as long as I keep my foot out of
it, but boost comes on much stronger and at lower RPMs than usual...at
minimal throttle I hit 1.8 bar on the gauge and hit overboost (qlcc
chip, Scott Mockry 1.8 bar spring...like a Charlie spring). I made it
home fine, in fact didn't hit overboost once after realizing what was up
and keeping my foot out of it.

I stopped to take a peak at a gas station, but not much light. No
obvious hose problems at the WG lower chamber so I am guessing it is a
sticking WG (doubtful, this came on all of a sudden), or more likely, a
torn WG diaphragm.

Questions:

1. Am i okay to keep driving the car (as in the 200 mile round trip to
Sears Point tomorrow)? I assume so, if I keep my foot out of it like I
did on the way home. Doesn't qlcc code go full rich above a certain
boost level anyway (thinking lack of WOT switch, there's no way to get
the throttle to that position). I have the version that will control
boost without the help of the spring.

2. Who has WG diaphragms in the US???? (I'll ask the Bennett brothers
tomorrow as well since they're up at Sears Point.)

BTW, an aside...my first attempt at shooting on-track with my new toy,
er tool, an Olympus E-10 digital (which I hope to offer on-site prints
with starting next season). I'll post the gallery url as soon as I have
the shots up...I'm posting this prior to even downloading the memory
cards so we'll see how I did.

TIA!

Mike Veglia
Motor Sport Visions Photography
http://www.motorsportvisions.com