got a gsr,was runnin fine till my speedometer started to drop to 0 mph every time i would touch the peddle.then it just wouldnt move off of 0 anymore...i thought it had to be my speed sensor for sure but i changed that and there is still no speedometer which means no vtec....what can it be????

 

What would your speedo have to do with vtec?
It's RPM activated, not speed.

 

+1

 

VTEC does not engage under 20mph

 

Gotcha, did you check the wiring harness for the speedo?
Cause that happened to me in my old car, and the clip in
the back was just a little loose.

 

were are you located.. I will fix the problem for cheap of local

 

ya the vtec engages when ur over 20 mph....i gotta double check the harness for the speedo...jus wanted to know if it could be anything else???

 

I do love you, just to let you know

Check the ground for the speedo harness, like everyone else has said.

 

check for blown fuses as well.

 

The ECU throws a code due to the defective sensor and cuts off vvt (oil)pressure therefore, no VTEC

It happened to me in the ol' Prelude Si. Switched speed sensor/gear and it worked again. I actually rode around in it with no VTEC/Speedo for a long time then when I got the new sensor it was like doin a huuuge mod to my kahh!

Anyway it is very possible that you may have picked up another defective speed sensor. Where did you get it?