Chad -

In regards to your cold start idle problems, check your Auxilary Air Valve.
This has to be working correctly to allow for proper warm-up when cold.
They are no longer available new, only reman from a Python Injection sellor
or good used.  They are the same on 76-79 Buses, 80-83.5 Air Cooled Vanagons
and 83.5-85 Watercooled Vanagons.

There has been recent discussions on the proper troubleshooting diagnosis of
the AAR on the list.  Check the archives for the past two weeks of list
mail.
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
***********************************
On 10/3/07, Scott Daniel - Shazam <scottdaniel@turbovans.com> wrote:
>
> Hi.
> I do have good used 1.9 air flow meters if that's what you mean by 'air
> intake sensor.'
> I find I have to check over about 6 to 8 things on 1.9 wbxr's , when they
> don't run right.
> It's common almost.
> Some items I always consider and check :
> Coolant temp sensor and its connections,
> Any air leaks anywhere,
> Throttle switch adjustment.
> Air idle screw adjustment
> Air flow meter CO adjustment screw
> Oxygen sensor performance,
> Anything to do with cat or exhaust system,
> EFI wiring harness......'rarely though'
> ECU  - also rare but possible.
> Ground connections everywhere.
> The usual tune up items.
> Spark plug wires.
> Air flow meter
>
> I've had to check, try other parts, clean and inspect and just mess with
> them for quite a while to get them right again.
> Scott
> www.turbovans.com
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Chad Lyles
> Sent: Wednesday, October 03, 2007 6:13 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: 84 Vanagon GL Intake Air sensor?
>
> Hello all, my name is Chad I'm new to the list and to the world of
> vanagons,
> i have owned many VW's but never a vanagon. so... i have some trouble
> shooting questions.
>
> OK here are my symptoms.
>
> when i take off from a dead stop or just try to accelerate quickly, like
> passing gear (punch it) i am "hopping" its not stalling, but lurching, and
> i
> am gaining very little speed or RMP's. if i let back on the throttle a
> little i lurch forward and gain speed...i can get up to speed but not very
> efficiently and cruising is fine...the gear change is smooth (its
> automatic).
> i am also having some cold start idle problems that dissipate once the
> engine has warmed up nicely...the guy i just bought the vanagon from told
> me
> all this stems from the intake air sensor...and i would like some input
> before i buy a new because they are difficult to find used and new they
> are
> really expensive.
>
> my questions are:
> *does this sound like its the air sensor? or does this sound like
> something
> more serious?
> *will this harm anything if its not fixed promptly?
> *are the idle and acceleration problems part of the same issue?
> * if this is an air sensor problem can i by-pass the sensor? (i was told
> there was a way but i don't trust the idea honestly)
>
> i am sorry its so many questions at once.
> thanks for listening
>
> take care
>
> Chad
> 84 Vanagon GL ~ "Hop-a-Long"