my Vtec sometimes on and sometime not, and its not running so smooth even it's on, I have got a Apexi V-AFC, but still the same, when it's not on, I can still hear the VTEC sounds.

plz. advise!!

thx....

 

check oil level.

Any codes from the ECU?

 

no ....

I was about to change the oil..... but I had it changed since Sep.

my friend told me the cam might not move properly..... what do u think??

 

Uh, yea. If your cam isn't moving properly, your car isn't running at all.

Like I said, check the oil level.

You should also remove the VTEC solenoid and check the screen, it could be clogged.

Did you find out if the ECU is throwing a MIL code?

 

reset your ecu, and try it again.

 

I mean not changing to the Vtec slot properly.....

What do u mean by MIL code???

and also, my revs counter goes crazy when it reaches about 5000rpm, but the reading on V-AFC is find..... do u think this problem related to the VTEC problem??

 

How to reset my ECU???

 

MIL - Malfunction Indicator Light

Your revs go nuts when you hit about 5k? Was the VAFC recently installed? Any other work done to the car recently?

 

un hook ur battery cable to kill power to ur ecu..wait a 15 min. befor reconnecting the let the motor indle while the ecu is reseting..should do this whenever any mods are made so the ecu can map the new hardware

 

[QUOTE]
You should also remove the VTEC solenoid and check the screen, it could be clogged. [QUOTE]

how do you do that? is it relativly simple?

 

it happens even before I install the V-AFC....

Only the revs clock, I have check it with Honda main dealer, they said may be is the revs sensor, and it doesn't related to my engine.

 

I've checked the oil level this morning, it was empty, but it goes back to normal after I travelled somewhere.

?????? >.<

 

*cough* its called a tach

 

WHAT?! It's empty in the morning, but if you drive on it, somehow your engine magically comes up with oil??? Somethings fishy.

Are you sure you checked it on a flat surface?

 

just slighty un-flat......

But anyway, the oil level is fine now, goes back top normal.

 

*cough* its called a tach ?????

what's that means??
plz. explain..

 

The "rev clock" is called a Tachometer or Tach for short. When do you check your oil!?! The oil should be checked after engine is hot, shut off engine, pull dip stick, wipe, reinsert dip stick, pull out dipstick hold horizontal and examine oil level.......does the oil on the dip stick look dark? If so, change oil.