I have a 2002 S. Currently I'm running a vortex supercharger with an APEXi VAFC controller. It was originally installed by a friend of mine however he had a brain injury and unfortunately can no longer work on may car. On my last trip out the car seems to be starving for fuel or air at idle and low RPM and I have to keep the throttle up to keep from stalling. I suspect I have inadvertently fat fingered the controller which is located on my console below my elbow and don't know how to reset it. (I have never really understood or used it) I don't drive the car for competition and would prefer either to disable/reset it and relocate the controller out of site or totally remove it. I'm assuring the supercharger can still be run without this controller. Advice and or instruction are greatly appreciated!

 

Well yeah without knowing what you might have hit on the controller, your best option is to just remove it, and hopefully its using a PNP harness so you can simply unplug it from the engine harness and plug back into oem ecu. 3 min job.

The car will likely run a little more sluggish under vtec from the added rich fueling that's inherent in these set ups and your vtec wont come in as soon, so its going to feel different and probably kick harder, but is what it is. At least it will run safe for now.

 

Sounds to easy to work!!

 

Seems a bit risky to just assume it is safe with it unplugged, I would get it retuned.

 

The vafc only can subtract fuel and lower vtec guys. Its just used as fine tuning around the rising rate fuel pressure regulator fuel enrichment -which does an effective but rather crude form of fueling. The kit was designed to run without the vafc, so its an enhancement tool stacked on to fine tune, not a necessary one to run safe, if anything the opposite depending on its settings.

Just remove it assuming its pnp. If he actually wired it in because was too cheap to get a pnp harness well then id advise you leave it and have to learn the setting parameters in the vafc and check them all. If you bumped a fuel setting or lowered vtec more, you could be running too lean in an area of the rpm. I don't suppose the OP is running a wideband like he should?

 

Good info. What about just resetting the VAFC to the factory default settings by re initializing the unit? There appears to be a fairly simple procedure for this on the last page (41) of the manual under "Initializing all Data."

 

I wouldn't, because then you will have to start from square one and set all the parameters to even run with the car, and then you will have no tune as well, so the net effect with be as if you pulled it from the car, but worse because your leaving it in there and its now running in factory default, meaning could be set up to run with a 6 cylinder accord, who knows. Whatever the default is on that unit. either pull it entirely, or get the book on it so you can navigate through all the parameters to check and understand the current tune on it and verify if anything or what might have changed. You have a narrow and wide throttle, vtec low/hi settings and several other things that aren't as crucial but should be set and forget, which don't really influence the fuel or vtec tune. Its just a simple air/fuel correction controller that can only subtract fuel on the s2k, along with some vtec adjustment. But the input/outputs and cylinder count and other things all have to be programmed right to work with the s2k and those will be lost once you re set it.

 

Thanks ..its usually never simple or easy!! I'm good with wrenches but pretty much an idiot with electronics!! ( I do love turbos and superchargers though)