Help with tach signal
10-30-2013, 08:33 PM
#1
Staging Lane
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Help with tach signal This is the last thing left on my swap.
2005 5.3 into 1990 240sx. Apparently you can connect C2 #10 engine speed (tach) wire directly to my twin cam tachometer & it will work correctly. As per every other LS 240 owner on the internet.
This does not work for me. With a voltmeter on the #10 wire, it is only showing around 1/20th of a volt (.05 -.07) & the tach needle doesn't move. My harbor freight obd2 scanner shows the RPMs correctly though.
Any advice? The engine & computer came out of the same truck. Tach was working when pulled.
2005 5.3 into 1990 240sx. Apparently you can connect C2 #10 engine speed (tach) wire directly to my twin cam tachometer & it will work correctly. As per every other LS 240 owner on the internet.
This does not work for me. With a voltmeter on the #10 wire, it is only showing around 1/20th of a volt (.05 -.07) & the tach needle doesn't move. My harbor freight obd2 scanner shows the RPMs correctly though.
Any advice? The engine & computer came out of the same truck. Tach was working when pulled.
10-31-2013, 12:50 AM
#4
Staging Lane
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Found it. I need a 680ohm resistor. I'll get one in the morning & report back.
Don't know how it didn't come up in my searches.
Thanks guys!
Don't know how it didn't come up in my searches.
Thanks guys!