Tach & speedometer both pegged

[RonReid]

1990 Pontiac Trans sport. New vehicle speed sensor installed, new wiring and connector. New coil & disgtributor

[Jeffrv]

Are the other gauges readings accurate?
Not sure if what I have will be of much help, my manual is for 1995, cant say what differences there would be for your 1990 model.
Jeff

[RonReid]

Yes, voltmeter, oil pressure and coolant temp. are all working accurately.

[Jeffrv]

Ron:
E mail me at jeffb at ontera.net and I will send you a scan from my manual.
Good luck
Jeff