My tach stays pegged at any RPM. It's been like this since I bought the car 5 years ago. Any thoughts.
Are we speaking about the stock tach on an analog dash TR?
Have you checked the tach connection under the hood to see if anything was connected to it?
it may be a symptom of old age or it may be that the tach test lead is plugged into the fuel pump test lead under the hood.
If that is the case, unplug them...probably won't read right but it might be more tach like anyway.
It's a stock 86 gn with regular dash. Where are those leads you are talking about?? Thanks for the help!!!
two test leads coming out of the wiring harness on the driver's side behind the alternator or ac compressor. The tach test lead is comprised of two wires and has a big green connector on the end of them. I forget the color of the fuel pump...seems like it is gray but I am guessing. Anyway, nothing should be plugged into the green connector-nor the other one for that matter unless it is being used to trigger a hot wired fuel pump.
Found the connectors...they're not plugged in at all,so it must be just old.I'll get an aftermarket one.
If the tach connector grounds out, I think it will spike the gauge also. Make sure it is not touching anything back there. Mine used to bounce around and jump during normal driving. i taped the connector and it was fine.
I always though that it wasn't a matter of being accurate or not, it just kind of sucks when it doesn't work right. Good luck!
Geoff Bouma