Guessing your O2 sensor...or the temp 2 sensor on the idle

On Dec 9, 2017 10:04 AM, "Bruce Todd" <beeceetee@gmail.com> wrote:

Hi - I sent this out about 2 weeks ago but I think the server issues
stopped the email from reaching anyone.  A couple of things to ask for help
on.

Number 1

I have a recent idling problem that I am hoping to get some advice on -
knowing that this could possibly be a myriad of problems and not easy to
diagnose.  This is a 1986 Digifant.

Van starts - and idles at about 1000 rpm - all is good.  After about 5
minutes under load (partial warm-up) rpm climb to 3000 rpm and then does
not return to normal idle rpm.  The can fluctuate will from 3000 to 1000
then back up to 3000 - however when driving, the van responds fine (doesn't
hesitate or buck) just idles high when in neutral or when clutch is pushed
in.

So for now  - I have unplugged the idle stabilizer and the idle has come
down to about 900 rpm and the van operates fairly normally other than
requires a little more warm up time so it doesn't stall under load.  Idle
stabilizer is vibrating as it should. Noticing the van runs really well
when cold for about 10 minutes and then begins to hesitate a little when
accelerating in first gear from a stop.  This issue has been on-going for
awhile prior to the fluctuating rpm & unplugging the idle stabilizer.

The other item is that my instrument cluster lights no longer come on -
they were working intermittently but now have not come on for over 3
weeks.  Any typical failure points?

Driving in cool wet weather these days...Pacific Northwest winter.

Anyway I am turning it over to you folks to see what thoughts come up.

Thanks,

Bruce

86 Syncro Westy