ok before i say anything i will tell you that i have searched the site up and down and still had no luck!

I just did a swap into a 93 prelude that was an h23 and i installed the allmightly h22 and ecu both are jdm used parts... as the topic reads i have no vtec and have a 6500 revlimiter but no codes or C.E.L.! I have done all the wiring double and tripple checked the harness and pins, and have even gone to the extent to run new wired to the solenoid and switch...I have tried 2 other p13 ecus and no luck but i can use a p72 ecu and the rev limit is gone but still no vtec. This is the 4th swap of this kind that i have done and never had a problem like this. Could there be a pinout difference somehow in the harness? I am lost......... any help or ideas will be appreciated

Blake

 

Since VTEC depends on oil pressure, have you checked your oil?

It's the simplest answer, but you never know, figured I'd throw it out there.

 

1.is the tempeture gauge working?
2.is the speedo working?
3.is your oil pan dented?
4.is the wiring to the oil presure damaged?

 

sometimes it's not as simple as just wiring.

If you don't know that VTEC worked BEFORE you got the motor, it could be something more serious.

I'm not saying it is, but it's a thought you should have in case things don't start working.

 

temp gauge is working
speedo is working
oil pan is not dented
the wiring has been changed and looks fing
I can manually engauge vtec with 12 volts and it works