porsche4786

Well today I got up and decided to see when the last time is I changed my oil. I walked to my car and grabbed my slip that i wrote it down on. It says 60,017 miles 10/22/1005 oil and filter change. I check my odometer and it says 60,099 miles today 5/6/06. I have driven more than 80 miles in the past 6 months. But probably not more than a few hundred. I know my speed is correct because my friend had a gps on him in the car last night and it showed my speed (i didn't know i had a problem last night) and it was right on. I drove it around today checking my trip with my odometer and it wasn't working at first. I probably drove 15 miles and it only went a couple miles. Then I stop at subway, get back in and drive and i notice it's now at 60,010 miles. Somehow a few more miles all of the sudden were on it...weird. So I drive for a while and my speed was accurate with other traffic, the trip was then matching the odometer after a while of driving. But now when the digits are changing they go half way pretty quickly, then stops in the middle between the numbers, then when the mile is about over (according to the trip) it goes the rest of the way right as that miles is done. Seems like it should be going smoothly the whole way with no stopping. Also, I drive the miles loop around my neighborhood and the trip and odometer both showed 1 mile.



Any thoughts on what the problem is? Maybe the speedo cable needs lubricating? I have 17 inch wheels with 215/45 tires, if that makes any difference.



-kevin

Volksjager

you probably need a new speedo head unit. the odometer is gear driven inside the unit and is probably bad (either broken teeth or jammed somehow) you might be able to disassemble and fix it. but they are pretty intricate inside. i would just grab a used one

porsche4786

Is it possible to turn down/up the miles on them?

Volksjager

yes but again you have to disaasemble them and if you dont know what you are doing you can break them. technically your car is now TMU (true mileage unknown)

jarroyo

Yes it is but it's also very illegal. The odo failure is usually caused by resetting the trip meter while in motion. It happened to me with my 928 and first gen.

porsche4786

Well, I'm sure it's not illegal to turn up/down the miles on a used odo to match the miles on the original odo. On your odo's on your cars, do the numbers turn smoothly the whole way around? On my trip they do, but on the odo they turn half way, stop, and then when the mile is just about done, it goes the rest of the way. It's kinda weird. I'll probably take it apart tonight.

Volksjager

true if you knew the true mileage it is not illegal. but from what you said you dont know how many miles you put on the car since the odo broke.

Volksjager

i have a speedo cluster from an 88 it reads 94k i think. if yours is fucked let me know

porsche4786

Well, it's going to be pretty close, I know I haven't put very many miles on it. I don't drive to work, hardly drive it any distance and usually don't drive it since it's a 2 seater, we normally take a friends car. But I'd rather have it at what it's at than at whatever the used one might be at.

porsche4786

mmmk, I'll take it apart when I get home tonight.