Dekorum

I have a JDM D15B OBDII 3-stage VTEC motor (I know.. OBDI D15Bs are really hard to find now) in my EG hatch. I have a P28 ECU and obviously the OBD I O2 hooked up and I have no check engine lights. I have only the regular VTEC solenoid hooked up (because you can only plug one into the USDM harness). I am sure it is the regular one and not the vtec-e one because it has the green wire which is usually used to indicate regular vtec. Anyway, the motor is running fine and I am able to redline the car and engage vtec perfectly fine.. until 4th gear. When reaching 6000 RPMs in 4th gear the CEL light comes on (code 22) and I cannot rev any further. Since I am able to engage vtec in every other gear that means that my pressure switch is most likely working. I am not sure what the problem is and I don't know if getting a new vtec pressure switch will fix it. Yes, I have checked the oil level and it is perfect!

Any thoughts?

Dekorum

Anyone have any ideas?

Dekorum

Can't believe no one has a clue

Daviddnva

Just bypass the pressure valve there is no way you have vtec! Use a piece of wire and jump the two wires together.

tdbhonda

do what david said

other than that if you've wired in vtec at any point double check all your connections

Dekorum

I don't understand what you're telling me to do. Are you saying that even though I have one of the solenoids hooked up I really don't have vtec? Why would I bypass the pressure valve? Isn't that needed for vtec to engage properly with USDM ECUs..

Dekorum

bumpp

tdbhonda

check your connections i just had a problem like this and here is what i was instucted to do... ill post the thread
he instructed me on what to do... mine ended up being a loose wire... but heres how to go about it

g/l

here it is
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/csf-sensor-obdiia-2529435/

Dekorum

I don't really understand what that is telling me to do.. I have a VTEC pressure switch already because I know that my P28 looks for one..

tdbhonda

sorry but if you cant understand that i dontknow what to tell ya
see if you can try a friends pressure switch
its the one on the bottom side of the solenoid with two wires going to it
unscrew it... screw a friends in and see what that does for you
a new one is like 60

Dekorum

Yeah I was gonna try looking for a friend who has one to let me try. I was just asking here first because maybe someone knows that its not the pressure switch or something.

tdbhonda

oh i had code 22 last night and today i went to the drawing board after the help from the guy in that thread... just before i was getting ready to switch the pressure switches i figured id tug on the wires since a friend and i recently wired them... turns out one of the wire ties didn't hold so that ended up being my problem

Dekorum

Yeah, I've already tried messing with the wires. I only get the code 22 light when I am going WOT on the highway and almost redlining 4th gear. So thats not quite often..

tdbhonda

alright if you have access to another pressure switch just try that keep posted