i recently jus purchased a pr3 ECU thats obd0. and it works with no problem but my motor feels like it lacks power wen vtec is engaged. almost as if it was bogging out . could it possibly be that vtec is actually not engaging or something else that i might be over looking. i had the wiring checked twice and its correct so i kno its not that. i have a 91 hatch w/ a d16z6 motor. any help would def be appreciated and repped. thanx

 

have you checked your oil? make sure you have enough oil or vtec no work

 

so that can happen? its relly starting to make sense because i have a very slight oil leak throu my cam seal and through my dizzy (d16a6 dizzy) and i think i've been a lil low. thanx faded i apppreciate. i'ma go put some oil before work and try it out if it still does the same thing i'll post a gain.
repped

 

yeah, if your oil pressure is low, vtec wont turn over. vtec works off of oil pressure.

 

Well I didn't have enough time to actually tell a difference but I have to do an pi change before I head out to the track on Friday if not canceled. But if nothing happens I will repost

 

You need to be running OBD1

 

that makes a big difference as well.

 

Please explain

 

I don't mess with OBD0 but have heard of several issues with your setup. ECU looking for second O2 sensor, speed sensor issues related to vtec engagement, knock sensor, etc. OBD1 just saves a lot of trouble.
Are you throwing codes?

 

I'm only throwing a knock sensor code (code 23) any more suggestions would be appreciated