my CEL came on and i took my car up 2 auto zone. they hooked my car up and it said that my A/F ratio is off and my car dosent feel like it is running very effiecient. i have had my VAFC hooked up for about a year and i never use it because i dont want 2 f up my engine. So i was wonderin if any1 knew how to work a VAFC so that i could get my car to run smoother and more efficient.

i drive a 99 honda civic si B16 with mods= intake, exhaust, headers, radiator, MSD ig box, cap, ex coil, plugs and wires, cat, and VAFC

 

what's the specific code?

 

the code is P1259 which means a VTEC malfunction. but there are 2 more things listed below the code and they are -manfacurer control and -fuel air metering.

i jus installed a VTEC solenoid with switch a week ago when the light came on, so thats not the problem anymore. i can tell by driving my car that that its not effcient so is there any slight changes i can make on my VAFC to help things be tuned a little better. im going to get a EMS soon and was wonderin if i could tune with my VAFC until i get the EMS.

 

It wouldn't hurt to take it to a mechanic.

I'm sure it's a simple problem.

Are you sure the solenoid is getting oil?

Is vtec engaging?

Are your breather hoses plugged in?

 

If your air/fuel is off, you may want to think about replacing your Primary O2 sens, and even your MAP sensor.

 

nope sorry cant help ya on this one

 

take off that peice of **** VAFC, you don't need it or the EMS, for a stock B16