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COP upgrade but now lost RPM signal to rev-counter..

Ryan Simmons

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I have upgraded the single coil / distributor system on my 3s-gte engine to a set of 4 1zz-fe Coil on plugs. The engine runs on them and the PClink software will show the engine RPM no problem, however the dash Rev-counter does nothing!

I guess the old RPM signal came from the single igniter. What would i need to do to get the Rev counter functioning again?

Many thanks


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Hi Ryan.

The best thing you could 'try' is setting a spare AUX as a tacho, as this would work if the dash only needed a low level input.  If this does not work, it's likely you have a tahco needing a high level signal in.  This leaves you needing to have it modified (if it can be), or installing another that fits the vehicle.


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