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 > |
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