Tacho wont work with COPS
#1
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Join Date: Sep 2014
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Tacho wont work with COPS
hello everybody, I have fabbed up a loom and installed celica VVTI coil on plugs on the car. The tacho works fine with the stock ECU and COPS conversion.
when I converted to my MS1 PNP 9093MMD ECU (white and red) with the COPS the tacho stops working but tuner studio says the correct rpm.
So right now I have the factory ignitor and coilpack on the car and the tacho works fine.
I was told I need to run a wire from the ECU to the back of the tacho to get it to work correctly.
is this correct? ifso where do I connect it to the ecu?
going turbo soon so id like to prevent spark blow out before it will get tuned
when I converted to my MS1 PNP 9093MMD ECU (white and red) with the COPS the tacho stops working but tuner studio says the correct rpm.
So right now I have the factory ignitor and coilpack on the car and the tacho works fine.
I was told I need to run a wire from the ECU to the back of the tacho to get it to work correctly.
is this correct? ifso where do I connect it to the ecu?
going turbo soon so id like to prevent spark blow out before it will get tuned
#6
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Thread Starter
Join Date: Sep 2014
Location: whats that coming over the hill?
Posts: 67
Total Cats: -15
hello everybody, thread revival lol.
Just installed a 1k resistor bridging the B+ and -IG terminals in the diagnostic ports and it worked, decided to take it for a drive and the tacho stopped working again!
so I messed around with the resistor still got nothing.
Bought about 4 more resistors and still getting the same thing!
they are 4 pin coils, the MS1 picks up the rpm fine on tunerstudio.
anything else I can do?
Just installed a 1k resistor bridging the B+ and -IG terminals in the diagnostic ports and it worked, decided to take it for a drive and the tacho stopped working again!
so I messed around with the resistor still got nothing.
Bought about 4 more resistors and still getting the same thing!
they are 4 pin coils, the MS1 picks up the rpm fine on tunerstudio.
anything else I can do?
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