Anybody use a stock mustang tach?
05-13-2012, 09:22 PM
#1
Anybody use a stock mustang tach? I'm wiring an ex four cyl, 86 mustang with an ls1 from a 01 camaro. Using factory mustang gauges. I have all of them functioning ,but the tach. I hooked the tach out put from the pcm to the correct wire on the gauge cluster but it doesn't work that way. The mustang gauge uses a signal from the negitive side of coil. Any body know what kind of signal exits the camaro pcm? If anybody has made this work lets here it.
05-14-2012, 09:21 AM
#4
On the tach inself under the trim panel on the tach itself there should be a little switch that sayd 4-6-8 and a flathead screw that will allow you to turn it to the correct number of cylinders. If memory serves me the GM PCM outputs a 4cyl tach signal, so you should be ok there. Just wanted you to have that info.
Some people have to use a pull-up circuit to make the signal work.
try that. hope it helps.
05-14-2012, 09:39 PM
#5
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Correct on the tach not being accurate, but there are trim pots to calibrate them on the back side. I am using the factory v8 tach, had the tuner change the output. I did not need the pull up resistor. I also wanted the OEM look, no aftermarket gauges except the wideband next to the column on the cluster bezel.
05-14-2012, 09:46 PM
#6
Correct on the tach not being accurate, but there are trim pots to calibrate them on the back side. I am using the factory v8 tach, had the tuner change the output. I did not need the pull up resistor. I also wanted the OEM look, no aftermarket gauges except the wideband next to the column on the cluster bezel.
05-14-2012, 09:48 PM
#7
Unless you are like me and want all the factory gauges to work. I dont like the look of aftermarket gauges cluttering my interior.
On the tach inself under the trim panel on the tach itself there should be a little switch that sayd 4-6-8 and a flathead screw that will allow you to turn it to the correct number of cylinders. If memory serves me the GM PCM outputs a 4cyl tach signal, so you should be ok there. Just wanted you to have that info.
Some people have to use a pull-up circuit to make the signal work.
try that. hope it helps.
On the tach inself under the trim panel on the tach itself there should be a little switch that sayd 4-6-8 and a flathead screw that will allow you to turn it to the correct number of cylinders. If memory serves me the GM PCM outputs a 4cyl tach signal, so you should be ok there. Just wanted you to have that info.
Some people have to use a pull-up circuit to make the signal work.
try that. hope it helps.
