OK here goes: 97 Civic DX Coupe 00 Si B16A2 Swap 97 p72 ecu Car has run fine since the swap was done 3 years ago. Recently the VTEC stopped working and my redline went from 8200 to 6500. The engine cuts out at 6500 in all gears. I went to AUTOZONE and they told me I had a code P1259. After much research, I have learned to check a number of things. I removed the VTEC oil pressure switch and tried one from my friends b16a3, but it still won't work. Redline is still 6500 ...I'm guessing because ecu is in limp mode. My oil level is fair..I would say towards the bottom line of the dipstick but still between the lines. Could the oil level be the problem? I know its not the pressure switch and all wiring appears normal. Help cuz not having VTEC sucks.