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86 Posts
I was driving with my GPS the other day and I noticed that my speedometer read about 12-15% slower than my actual speed based on GPS. It was pretty consistent up to about 80 mph.
I know that by changing the tire size it could mess with the speedo reading being accurate but I have an 86 Spider and my tires are 185/70~14, which I believe are stock size.
I read the post about "how to fix a slow reading tach/speedo" but I don't think thats the issue. All the lights and gauges work (with the exception of the fuel gauge-prob sending unit). The speedo and tach "bounce"' a little upon initial acceleration, but I can deal with that... Any thoughts?
I know that by changing the tire size it could mess with the speedo reading being accurate but I have an 86 Spider and my tires are 185/70~14, which I believe are stock size.
I read the post about "how to fix a slow reading tach/speedo" but I don't think thats the issue. All the lights and gauges work (with the exception of the fuel gauge-prob sending unit). The speedo and tach "bounce"' a little upon initial acceleration, but I can deal with that... Any thoughts?