Tach jumping around after RPM Window Switch install
#1
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I installed Jegs RPM window switch #40824
This is a digital window switch that also displays RPM.
I used the white tach wire from the pcm and set the switch to 4cyl mode
The tach jumps around like crazy. The Window Switch displays the correct RPM.
I can switch it to 8cyl mode and the tach performs as desired, but the window swich shows half of the correct RPM.
I tried boosting the tach signal as suggested in a search with a 1k Ohm resister to 12v+, but this made no difference.
Any suggestions?
This is a digital window switch that also displays RPM.
I used the white tach wire from the pcm and set the switch to 4cyl mode
The tach jumps around like crazy. The Window Switch displays the correct RPM.
I can switch it to 8cyl mode and the tach performs as desired, but the window swich shows half of the correct RPM.
I tried boosting the tach signal as suggested in a search with a 1k Ohm resister to 12v+, but this made no difference.
Any suggestions?
#2
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What kind of vehicle is this?
Are you saying if you change the RPM switch setting from 4 cylinder to 8 cylinder that fixes the problem with tachometer?
Are you saying if you change the RPM switch setting from 4 cylinder to 8 cylinder that fixes the problem with tachometer?
I installed Jegs RPM window switch #40824
This is a digital window switch that also displays RPM.
I used the white tach wire from the pcm and set the switch to 4cyl mode
The tach jumps around like crazy. The Window Switch displays the correct RPM.
I can switch it to 8cyl mode and the tach performs as desired, but the window swich shows half of the correct RPM.
I tried boosting the tach signal as suggested in a search with a 1k Ohm resister to 12v+, but this made no difference.
Any suggestions?
This is a digital window switch that also displays RPM.
I used the white tach wire from the pcm and set the switch to 4cyl mode
The tach jumps around like crazy. The Window Switch displays the correct RPM.
I can switch it to 8cyl mode and the tach performs as desired, but the window swich shows half of the correct RPM.
I tried boosting the tach signal as suggested in a search with a 1k Ohm resister to 12v+, but this made no difference.
Any suggestions?