Connecting 92 tach to DIYPNP
#1
Connecting 92 tach to DIYPNP
I have a 92Miata running a DIYPNP and VVT controller to run a2001 engine. I connected the 01 coils through the 15 pin connector. now my tach doesn't work and I understand why but can I use the tach out in DIYPNP through the 15 pin connector to the yellow/blue tach wire and bring my tach back to life?
#4
Boost Czar
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You need to grab a 1k 1/4watt resistor, open your diagnostics box and jump IG- with B+ with the resistor. Or you could do the same within the MS box by jumping that Tach input wire with a 1K resistor to 12v inside the unit itself.
It needs a pull up on the signal and there is none currently.
It needs a pull up on the signal and there is none currently.
#9
I checked continuity and found a wiring issue in my fat fingered soldering on the 15 pin connector. I fixed it by moving both wires to the next pin on the DB15 and had continuity, turned on the Tach output, fired the car and still no tach.
Can the pullup fail? Can the tach fail? Worked fine with the MSPnP
Or are there other settings that I'm overlooking?
Can the pullup fail? Can the tach fail? Worked fine with the MSPnP
Or are there other settings that I'm overlooking?
#10
I could never get the tach to work on my 93 with the diypnp. I went back to the 1k resistor in the diagnostics box. When I enabled tacho after wiring into the blue yellow wire; the tach signal worked fine at idle, but didn't move correctly with engine rpm. Maybe I wired something incorrectly in the diypnp
#16
Supporting Vendor
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Oh? Yes, you 100% need to unplug it. It has a tach output on it.
I'm not sure if that has any negative implications as far as potential damage to the DIYPNP tach driver (which is on the module).
I'm not sure if that has any negative implications as far as potential damage to the DIYPNP tach driver (which is on the module).