gutted cat for dinner

[Huw Powell]

> > So, for fuh-evuh I've had an un-diagnosable, intermittant high idle problem
> > on my '87 5kcstq. Many an audi wrench couldn't figure it out.
> >
> > Latest guy is thinking bad cat. It does make a tinny-vibration noise
> > sometimes (I assumed it was just a bad hanger or something). It kinda makes
> > sense; bad cat sends bad info to O2, the confusion begins.

the cat does not "send a signal" to the OXS.  it is after the OXS and
tries valiantly to clean up some of the combustion byproducts passing
its way.

theory: intermittent idle switch.  if it is "open" instead of closed at
idle, the engine does not "know" to lock down to 850 rpms or whatever.

-- 
Huw Powell

http://www.humanspeakers.com

http://www.humanthoughts.org