how would we be able to test if the mivec on my car is working?
i tryed to search and couldnt find anything

 

Rev to 3500 rpm you can hear the motors sound change

plus if it wasn't working right you'd probably have a p1020 code

 

i need a new cat and i have 2 holes by the cat where the last person welded the cat could that have anything to do with it?

 

as mentioned try to listen while driving but it would be pretty hard,
or
look in the how to's and search for a mivec light thread, you prob dont need to go as far as installing something in the dash, but just something so you get an indication that is it engaging,
also
mivec does not engage when there is no enough oil pressure, so wait till engine is warmed up and you also have enough oil

 

i just changed the oil though what could cause the problem?

 

what problem, i dont understand what your asking there

you needed to find if mivec was engaging, using a light would let you know, changing your oil should have no affect if you used the right type and amount

 

oil pressure

 

I think he's asking if its possible that his engine isnt making enough oil pressure to activate MIVEC at 3500rpm, and whether changing the oil could have had an effect.

 

open your hood.
turn on your car.
rev your car slowly with the throtle.
hear the car.
know mivec is working. lol

 

+1, im curious, what brought up this question anyways? were you just not sure what mivec sounded like when it kicked in?
i mean, mivec dosnt throw into the back of your seat and things dont start to look like the fast and the furious when they hit the NoS button. lol
-Flip

 

last time my mivec engaged..... i somehow ended up in my back seat with my boxers on my head.

 

lol i dont know what engaging n.o.s feels like ive never been in a car with it
but at least you can feel it when it kicks in and i cant feel it kick in anymore

 

perhaps you've grown accustomed to it.

 

idk i dont think so i could feel it anytime i wanted to and now i cant im going to buy an oil pressure gauge and a wideband afr ( i also want them in my car lol) just for future refrences as well.