First off Id like to say hello from NC. I just purchased a 2000 S2000. It Came with DC 4 2 1 headers, injen intake, and an Apexi Vfac Not the second generation. I have searched most of the S2000 forums along with the hondas. The VFAC was tuned wrong. So I removed it. They wired it in instead of getting a harness. Im pretty good with wires so I wired it back up matching the wires he cut. Also I disconected the negative before I started. Plug it back in and conect battery and it fires up. After letting it sit I take it for a spin. It refuses to go past 6000 rpms. I checked the oil and it was slightly getting below L. Im like oh ok so I run out to the store put a quart in and take it down the road no cookies for me still stutering. Now I try reseting the check engine light and codes and fire it up but no. Im out of ideas what else do I need to be looking at? Im gonna get it scanned today. Has anyone else had this problem?

 

This may or may not help, but I'll try anyways. I am not sure how much you have read already but the ECU will not let the car rev above 6k when it is not fully warmed up. You must have 3 bars (AP1) on your temp gauge before you can rev above 6k.

If they car was fully warmed when you tried, then I have no idea as a VAFC is out of my league.

Good luck!

-Mike

 

The code was 1259 something about airflow meter? Please help.

 

Taken from the stickey in Under the Hood. "P1259 VTEC System Malfunction" Certainly explains why it stops at 6k

Sorry I can't be of more help man, good luck.

 

OK I have just left the stealership. They said It must be in the wiring. For anyone curios as to which wires are the vtec wires on a s2000, blue and black go to the pressure switch, and green and yellow go to the vtech sensor. Hope this helps.

 

does anyone know if /the Blue\black, green\yellow wires are hot while the engine is running? I have been vtechless all weekend its killing me. Please help.

 

OK final update for anyone who ever goes through this in the future. sometimes the wires to the harness will come loose.I had to force the blue black wire back in the clip of the harness.