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1.6 Tach jumpy after 3k
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Topic: 1.6 Tach jumpy after 3k (Read 1400 times)
August 25, 2022, 05:27:03 pm
33B
Junior
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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?
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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 #1
August 25, 2022, 07:55:12 pm
ORCoaster
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Restoring a Caddy as time and weather allows
Re: 1.6 Tach jumpy after 3k
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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.
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Reply #2
August 29, 2022, 03:37:07 am
33B
Junior
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Bosnian with a money pit aka VW Passat 1987
Re: 1.6 Tach jumpy after 3k
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Reply #2 on:
August 29, 2022, 03:37:07 am »
Corroded male connection on alternator.
Thanks
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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 #3
August 29, 2022, 09:45:42 pm
ORCoaster
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Restoring a Caddy as time and weather allows
Re: 1.6 Tach jumpy after 3k
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Reply #3 on:
August 29, 2022, 09:45:42 pm »
Don't you just LOVE those simple fixes?
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VWDiesel.net The IDI, TDI, and mTDI source.
»
Engine Specific Info and Questions
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IDI Engine
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malone
,
burn_your_money
,
Vincent Waldon
,
theman53
) »
1.6 Tach jumpy after 3k