devdog1one

When my speedo says I am doing 80mph I am actually doing 70 mph. First I thought I had a bad speedo cable, so I replaced it. It still occured. Then I replaced the speedometer itself. It is still doing it. I have a 1987 se with 185/70-14 on it. Are these tires stock? Any ideas? I will be placing 215/45-17 on all four on 3/26.


Confused in Michigan

Joonas

hehehe the P.O. of my car put low pros on the stock rims and it says im doing 80 kmph when im doing 50

Icemark

base models, and luxury coupes had the tiny 14 inch wheels with the tiny 185/70-14 tires on them.

Has the cluster or speedo cable been replaced??? perhaps the speedo gear at the tranny or the tranny itself?

spunks

It maybe the speedo gear,some one may have modded the car in the past "may have had 18"s on it".

abarlas

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Wow, I have the same problem with the same model and year

skyypilot

My car has STOCK wheels and tire size and my speedo reads almosy 10 mph high at 70 mph. How can this be???

Jimmy325i

What are you using as a guage for the error?

GPS is the only accurate way of determining ground speed. (that most people have access to)

Jimmy325i

skyypilot, "My car weighs 2988 pounds now. Go put your coupe on a scale"

lol yeah and mine weighs WAY less than that....