On my 1971 1750 Spider, both instruments tend to stick at the bottom end:
the tach will read 1000-1100 with the correct 800-850 RPM idle speed; also, the needle fluctuates between 1000 and 2000 RPM before stabilizing.
The speedometer stays stuck to the lowest point until the car reaches about 25 MPH (my estimation), then jumps to what appears to be the correct speed; if I synch my speed with those police speed billboards that are posted along the road, it seems to be quite accurate.
Do the instruments need any internal cleaning of some sort, or some lubrication at their cable drives? How do I do it, and what oils/grease do I use?
Thanks,
Val in FL
the tach will read 1000-1100 with the correct 800-850 RPM idle speed; also, the needle fluctuates between 1000 and 2000 RPM before stabilizing.
The speedometer stays stuck to the lowest point until the car reaches about 25 MPH (my estimation), then jumps to what appears to be the correct speed; if I synch my speed with those police speed billboards that are posted along the road, it seems to be quite accurate.
Do the instruments need any internal cleaning of some sort, or some lubrication at their cable drives? How do I do it, and what oils/grease do I use?
Thanks,
Val in FL