Speedometer and Odometer Problem

[ajoudry]

Hey guys I was just wondering if anyone has experienced a kind of like a lazy speedometer I was wondering does anyone ahve any clue what u thiink the problem is would it be with the instrument cluster, or maybe the wiring harness, or the speed sensor. It's a 91 Turbo, and would neone have a turbo cluster available? Thanks

[masagsxr]

I don't believe there is a speed sensor on these cars. I know first hand experienced i replaced the "cable" on my 91 N/A

[palos]

I'm not certain what you mean by a "lazy speedometer". My speedometer does not register until I get to 15mph in actual speed. When passing radar speed signs by the local schools, my speedometer reads 5mph fast, i.e my speedometer reads 25mph and the radar signs read 20mph.

My speedometer is only off by 4mph at an actual speed of 40mph, assuming that the different radar signs are calibrated the same.

When I took my instrument cluster out, I noticed that the metallic coating on the speedometer spring was flaking, thus sticking/creating friction.

On the other hand, my tachometer when the outside ambient temperature is cold can stick at 3000rpms, later warm up and rev freely up to 4500rpms, and when finally warm freely go up to 7000rpms. I'm accustomed to the sound of my engine, so I'm not changing gears by what the tachometer reads, but by its sound. I'm assuming that there is an oil or grease which warms up with the engine and interior compartment, thus becoming more accurate.

Assuming that a different instrument cluster is going to be more accurate may not be the case, though it is likely less expensive than having the speedometer calibrated.

[Ben]

It could be the cluster, cables, or the gear in the trans