Rep Power: 0

regardless of VTEC our cars are slow economy SOHC's. You wont really feel the VTEC kick in. Most cars have variable valve timing now a days anyway our version of VTEC is nothing special.

 
Rep Power: 208

I believe that the Si models have a more agressive cam because I definately notice it when my vtec kicks in. It gets a lot louder and almost feels like a weak turbo kicking in around 5000 rpm.

 
Rep Power: 215

Thats because the vtec in a b series is totally different than a d series. The b series has the real vtec. But now a days they have the ivtec and vtc which is better.

 
Rep Power: 812

yeah some built b-series the vtec will throw you back in the seat.

 
Rep Power: 193

wait so i still didnt get my question answered
if i have my check engine light on will vtec work

 
Rep Power: 812

NO will not work. engine light puts the car in safe mode and you will not have vtec engagement. also rpm is limited to around 4k. if you have auto trans, you will notice it shifting poorly also (lag during shifts, like when the trans isnt warmed up).

 
Rep Power: 193

yea but i hit like 7000rpm and i have check engine light its a 02 sensor
code p0135 i hear no differnce

 
Rep Power: 812

it depends on the engine code. if its not something serious, then rpm isnt limited. but vtec still might be...

 
Rep Power: 367

just get the O2 sensor, test again... engine is not running well anyway.
first things first.

 
Rep Power: 193

I HAVE CODE IT IS P0135 if that helps

 
Rep Power: 367

fix
the
engine
first
then you worry if vtec is kicking in or not
look on the top of the page
there is a blue stripe
see the search?
click
type in your code

 
Rep Power: 229

i also have an auto ex. my car, maybe it's a freek, but it seems like vtec kicks in twice. once at 3500-3800rpm, a small kick and sound change, then later a second much more aggresive kick at 4500-5000rpm with a major change in sound. the smaller of the two is only felt if you're at 3000rpm steady then go faster. if i shoot from 0mph only the large vtec is felt. does anyone know if vtec happens in two steps or am i just feeling the gear ratio change after i go past 3000rpm?

 
Rep Power: 235

Primary O2 sensor (sensor #1)