S-PAutomotive.com
« previous next »
Pages: [1]

Author Topic: 1.6 Tach jumpy after 3k  (Read 1316 times)

August 25, 2022, 05:27:03 pm

33B

  • Junior
  • Offline
  • **
  • 58
  • Personal Text
    Bosnian with a money pit aka VW Passat 1987
1.6 Tach jumpy after 3k
« on: August 25, 2022, 05:27:03 pm »
1.6 tachometer jumping around after 3k rpm, or more exactly getting hung up.
Bad connection, bad tach, bad alternator?
Logged


1987 Passat B2 (33B)- 1.6TD JR, Audi 80 b4 front suspension and power steering. 280mm brake discs with 54mm calipers front. Rear MK3 disc setup with golf mk5 calipers.
Reply #1August 25, 2022, 07:55:12 pm

ORCoaster

  • Moderator
  • Veteran
  • Offline
  • ***
  • 4386
  • Personal Text
    Restoring a Caddy as time and weather allows
Re: 1.6 Tach jumpy after 3k
« Reply #1 on: August 25, 2022, 07:55:12 pm »
I would go with bad connections at the alternator and maybe in the back of the circuit board.  If You pull the cluster out you can put a direct connection to the signal of the tach and determine if there is a problem with the circuit board that way. 

Hard to determine if the Alt signal is wonky without an oscilloscope I think.  No idea how to check that unless it is just a continuity check with a meter.

Logged
Reply #2August 29, 2022, 03:37:07 am

33B

  • Junior
  • Offline
  • **
  • 58
  • Personal Text
    Bosnian with a money pit aka VW Passat 1987
Re: 1.6 Tach jumpy after 3k
« Reply #2 on: August 29, 2022, 03:37:07 am »
Corroded male connection on alternator.
Thanks
Logged
1987 Passat B2 (33B)- 1.6TD JR, Audi 80 b4 front suspension and power steering. 280mm brake discs with 54mm calipers front. Rear MK3 disc setup with golf mk5 calipers.
Reply #3August 29, 2022, 09:45:42 pm

ORCoaster

  • Moderator
  • Veteran
  • Offline
  • ***
  • 4386
  • Personal Text
    Restoring a Caddy as time and weather allows
Re: 1.6 Tach jumpy after 3k
« Reply #3 on: August 29, 2022, 09:45:42 pm »
Don't you just LOVE those simple fixes?
Logged
Pages: [1]
« previous next »
 

S-PAutomotive.com