My '85b MR2 has a tachometer freak out every day or so (either works perfectly or just pegs randomly with no change in RPM's). Is this the sign of a dying distributor pick up coil? It is still running fine. But I don't want to die in a bad place.
Western PA Long string of old Toyota's over the decades. Currently daily an '84 SR5 hatch, an '85 GT-S coupe and a 91 FJ80. Daughter #3 has an '86 MR2.
AFAIK the MR2 tacho will be triggered by a voltage spike derived from the coil negative. So no connection to the distributor pickups. Most likely you have a bad/loose connection somewhere on the tacho feed wire.
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