Good luck with the fires Mike.
I just got back from dropping off a half dozen tents to displaced folks at
the Napa Fairgrounds in Calistoga.
If you need a cold beer lemme know.
jvk

On 16 September 2015 at 10:08, Mike Miller <mwmiller6@att.net> wrote:

> thank you for your suggestions.
>
> I don't know how the tach gets its signal and haven't had time to contact
> Detlev to check. The fires in Northern California have kept me busy.
>
> It has also been suggested that there is a resistor in the instrument
> cluster that could explain the tach and the temp red flashing light
> symptoms also experienced.
>
> any thoughts on this?
>
> Mike
> --------------------------------------------
> On Mon, 9/14/15, SDF ( aka ;jim lahey' - Scott ) <
> scottdaniel@turbovans.com> wrote:
>
>  Subject: Re: bouncing tach
>  To: "Mike Miller" <mwmiller6@ATT.NET>, vanagon@GERRY.VANAGON.COM
>  Date: Monday, September 14, 2015, 1:42 PM
>
>
>      since it's a TDI,
>
>        I would ask what signal is going to the tach ..
>
>        is it alternator-sourced or is it directly from the
>  ECU ?
>
>        if the former ...one might look there some.
>
>
>
>        "tdi conversion "
>
>         is a very good list for this sort of thing.
>
>
>
>      On 9/13/2015 3:27 PM,
>  Mike Miller
>        wrote:
>
>
>
>        Yeah, I forgot. with a van always start with the
>  grounds. Even for a flat tire.
>
>
>  --------------------------------------------
>  On Sat, 9/12/15, Dennis Haynes <d23haynes57@hotmail.com>
>  wrote:
>
>   Subject: RE: bouncing tach
>   To: "'Mike Miller'" <mwmiller6@ATT.NET>,
>  vanagon@GERRY.VANAGON.COM
>   Date: Saturday, September 12, 2015, 6:05 AM
>
>   You either have a bad connection
>   somewhere causing false pulses, interference from
>  something,
>   or the tach itself. I would start by looking for wiring
>   issues starting at the chassis, (ground) connections.
>
>   Dennis
>
>
>   -----Original Message-----
>   From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]
>   On Behalf Of Mike Miller
>   Sent: Friday, September 11, 2015 8:09 PM
>   To: vanagon@GERRY.VANAGON.COM
>   Subject: bouncing tach
>
>   Vanners,
>
>   For the second time the tach in my 87 syncro westfakia
>   converted to TDI went crazy for a while. Bounced up and
>  down
>   and all over then after a few minutes went back to regular.
>   It a diesel dash pod with a diesel tach.
>
>   It was very hot yesterday but the first time it happened it
>   wasn't hot so….?
>
>   I have a tech tool hooked up  and it shows a steady
>   tach reading. but it's kind of disconcerting.watching
>  the
>   dash board tach go nuts.
>
>   Any ideas on what goes wrong and how to fix it.
>
>   Mike
>
>
>
>
>
>