amunoz712

my speedometer is marking 45mph when i am going 20mph. but when it marks 70mph and i am going 70mph. so when i go slow it marks the speed higher thatn what i am going but when i go at high speeds it marks the right speed. the car is a 96 ek 4door lx auto tranny.

Unseen Racer

check you vss(vehicle speed sensor)
it might have crapped on you. OR the wires MAY just be lose

amunoz712

is there any way to check that out before i buy a new one??

Unseen Racer

i believe that you can use a multimeter to check it.
you do know where it is located right?

amunoz712

im kind of a noob but is it on top of the tranny right

Unseen Racer

yes. near the firewall.
its held on by 1 10mm bolt(i believe)
http://www.hondacivicrepairs.com/vie...eed-sensor.JPG
http://www.hondacivicrepairs.com/vie...r-location.JPG

amunoz712

thank you i really appreciate now one more question. is there any way to clean it or fix or do i just have to buy a new one? and also which pin in the harness do i have to check for voltage?

Unseen Racer

more than likely you are going to have to replace them. and i would check all pins because in some cases its just a pin or 2 that are out. so check all of them and write them down in order. and see if any of them have a major difference than the rest.
but i would just replace it

amunoz712

so the problem would be the speed sensor not the cluster then?

Unseen Racer

well the speedometer gives an electric signal to your speedometer which makes it move.
OR maybe your speedometer just isnt working properly. if thats the case just buy a new cluster or just the speedometer part

amunoz712

it may be the speed sensor then because it marks fine at 70mph but not on low speeds

NHcuban

now jsut to jump on this right quick the honda im picking up in a month the speed-o jumps around the guy told me could the be the sensor or a junked cluster. and would i check it the same as the VSS?

Vindicator9000

Very likely it's VSS.

On these, it seems to be somewhat common for the pins to corrode, causing jumping speedo and eventual failure. If you're pulling yours to inspect it, make sure all 3 pins are on the sensor, and that all 3 holes are good in the harness plug. On mine, I had the middle pin rust out, and then it got stuck in the plug when I pulled it out to inspect it. Had to replace the VSS AND solder a new plug onto the end.

I was a little surprised because I keep my engine bay frikkin CLEAN, but I think maybe it was caused by all the cleaning I do in there... some water got in the plug and killed it.

CivicF4Ihead19

I have a mini d16 swap with a p28 computer. My speedometer jumps around, sometimes it's fine and other times it reads 0. (Been doing this since before the swap) I have replaced the vss and the gage cluster, any other suggestions?