I have a 95 z6 and its throwing a code for vtec, 21 VTEC spool solenoid valve
22 VTEC pressure valve. It is and obd1 motor in obd2 car, the cel will only go on when i get on the throttle and hit high rpms, guessing when vtec supposed to engage. I dont have a tach but in 1st at 35mph is when it goes on. I have a p28 ecu, wat can this be?

 

check your oil level, and also when is the last time you changed your oil?

 

checked that alrady and oil changed 50 miles ago, before that the car was sitting for 2 months

 

is the car fully warmed up? if so you may be looking to get a new solnoid

 

replaced the solenoid and yes the car is fully warmed up

 

need help vtec still not kicking in

 

22 is vtec pressue switch correct?

you need to ground your vtec switch wire, its the orange/white wire

i did the 00 jdm itr swap and i had code 22 which i believe is vtec pressure switch... the motor dosnt have the switch but the ecu looks for it..hints why it throws the code

ground your vtec pressure switch wire and bam....vtec works and no cell'

you can also link 2 wires together on the ecu but i dont remember which ones get tapped together...grounding also does the same thing'

 

thanks ill double check the ground when i finish work, any other ideas wat it can be?

 

ground is fine and the cel only goes on when im supposed to hit vtec, could it be a bad ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by silverboost &raquo;</TD></TR><TR><TD CLASS="quote">ground is fine and the cel only goes on when im supposed to hit vtec, could it be a bad ecu? </TD></TR></TABLE>

Doubtful, what kind of engine is it? Can you feel vtec kicking in? Or is it not (this way to verify whether it's just a sensor problem or it's not functioning)

 

nope vtec isnt kicking in, i cant hear it nor feel it. its a d16z6

 

i was thinking maybe just install a vtec controller and this will make it engage and solve my problem