MPH speedometer readings - Honda Prelude Forum

Si_g · 09-20-2003, 02:20 PM

This is from my friend:
"
ok, I have this problem for a while now... 95 VTEC 215/40/17 tires
I think this problem started to happen after I got my clutch (ACT) replaced with this mechanic... I know he does good work and all but it was my first time delt with him, now the problem is...
my speedo is off... reading shows faster at 0-50mph (but i'm actually below that speed) and reading shows slower at 50+ mph (ie. on highways when it says 75 but I'm actually going 85mph [tested many times with friends to verify]). Basically the speedo works just fine, it increase and decrease logically... it just giving out wrong speeds....grrr
so basically i've been driving by the RPM guage for quite a few months now...

I heard there's a speed sensor at the transmission up in the engine bay and there should be a speed gear too... but i'm not sure where it is and if i can take it out and have a look and fix/replace it because of my wrong speed reading problem... it's getting annoying

hmm you think he might have put it back wrong or it's just old and broke or what? also what needs to be done to get this fixed for a DIY? "

U.K VTEC · 09-20-2003, 02:27 PM

The VSS (Vehicle Speed Sensor) is located on the tranny, I believe, but I might be wrong. As the clutch was replaced, this would have been touched so it would seem that it could be the problem.

I am just speculating so don't take it as gospel, jus trying to point you in the right direction.

Si_g · 09-21-2003, 07:17 PM

we ll check that out

brendon2k · 09-21-2003, 10:22 PM

are you sure it was more accurate before hand? speedo's are no where near precise. they get pretty far off at high speeds but usually not as bad as your friends.