305civictyperaw

Ok so i recenlty replaced my speed sensor since my MPH wasnt reading but lately my needle has been randomly bouncing up and down.
does any1 know what this is? what should i do?

MonkeyMagic

noise in the circuit.

just wondering, did you replace it with a new or known good part?

305civictyperaw

noise in the circuit?
i borrowesd my friends VSS. it was working perfectly tho

egsleepercivic

my vss plug was loose and it made mine do the same thing, make sure its snapped on good and making a good connection

PGHRich

It seems like there may be lots of reasons for the needle to bounce. Here's my experience:
https://honda-tech.com/forums/showth...1#post43466039

305civictyperaw

thanks guise

305civictyperaw

so last night the needle kept bouncing and all of a sudden while driving the car started rev limiting @ 3,200 RPM's.

im not sure if its the ECU because it has a chip for 2step. i was told this is due to the fact that the VSS isnt working properly .. PLEASE HELP

Former User

If you hope to get useful replies, then provide all relevant information about your car and engine:

https://honda-tech.com/forums/showpo...48&postcount=2

Please familiarize yourself with the stickies at the top.

305civictyperaw

THANKS^^

Vehicle ---> 2000 HONDA CIVIC DX

Engines (STOCK) ---> 92-95, B16A OBD1

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I have plugged in a P30 ECU to avoid haveing the 3k rpm cutoff

CarpJDiem

My needle would Bounce sometimes on startup when it was slightly colder outside but this may not be in ur case.. also i had spells where it wouldnt even work (needle in car) so try taking the speed sensor off of the tranny spin the wheel around a little and make sure that the small gear on the end is not pushed up on the little rotor you can check this by pulling the gear wheel away from rest of the sensor GENTLY this will also give you a check if it is really loose and possibly worn out then carefully install existing or (new sensor) making sure you dont press the spinning gear back up on the little rotor. try this to see if it works and on the ecu part u may need to have your local shop (or if u have equip) burn a base map for your motor with no two-step making sure you tell exactly what upgraded parts you have on the motor setup.. GOod Luck HOpe this may help SOme

305civictyperaw

THANKS WITH THE P30 I SHOULDNT HAVE A PROBLEM CUTTING OFF @ 3K RPMS

305civictyperaw

bump. still bouncin up and down.. P30 ECU is runnning smooth though i just cant see how fast im going

305civictyperaw

ttt

305civictyperaw

been awhile but still having this issue. however, my vtec is engaging normally which is what i find weird