[tech] Help diagnosing an 8V?

[m-carlson@comcast.net (Michael Carlson)]

> Being that he has an 84 Scirocco listed in his sig, I have a feeling he
> doesn't have an ISV (that is a CIS-E thing), and 84 Roccos run CIS-Lambda.

But I do have A/C, and therefore an ISV, right?  Or is this a different
critter than the CIS-E ISV?

> Michael, when you hear the car run rough, does the buzzing of the
> frequency valve change?  Sounds like the system is adjusting the mixture,

Dunno, that's a good question.  I'll give it a listen after work tonight.

> badly.  Time to break open the bentley and get a dwell meter, you can see
> what your Oxygen sensor is telling the Jetronic brain to do.  Could be
> your mixture has changed, or, more likely, your oxygen sensor has gone

Hm.  That would be unfortunate, since this oxygen sensor has only been on my
car since March (along with the new TT exhaust & downpipe)...

> bad.  Try hitting the full throttle switch while it is idling, let us know
> how the engine acts when you do that.

Will do.

Thanx!
Mike Carlson
'84 Scirocco Wolfsburg Edition
'95 GTI VR6
http://www.divergent.org/mikes.vws/