Vtec not engaging, Low oil pressure?!
 

I started having this problem 2 weeks ago, when you first start the car and drive everything is normal, and it hauls ass. When the car warms up it looses vtec completely and throws code 21,22, and 3 ?! I checked the vtec solinoid, and the oil pressure switch, both are fine. I even bypassed the pressure switch but to no avail. I can't understand why the code3, i replaced the map sensor, and the plug and the Afc 2 reads airflow normally. this problem started when I added the turbo, could it be that the oil lines feeding the turbo is causing the vtec to have insufficient oil flow? If so what the hell can I do to fix that?! Run thicker oil perhaps? i'm running syntec 10w-30 now. If not what could cause this problem? Any advice would be helpful at this point. this ---- is pissing me off....thanks

setup;
95 Accord Lx/Ex hybrid
F22 B1 Stock internals
T3/04E hybrid turbo
1/8 steel braided oil lines
(also an oil pressure guage)
Front mount intercooler
Turbo xs type s bov
Turbo xs mbc
tial 40mm ext. wastegate
Stock ECU w/SAFC 2
stock injectors
9 psi.

Re: Vtec not engaging, Low oil pressure?!
 

Some Vtec solenoids go bad.....but check for crimps in the oil feed lines...and the oil dump. Make sure the mesh filter in the vtec solenoid isn't clogged.....and bump up your oil to sufficiently feed your setup!

Re: Vtec not engaging, Low oil pressure?!
 

when you say "Bump up your oil" do you mean get heavier/thicker oil? what would you recommend....20w50? If not, please explain.........Thanks in advance....

Re: Vtec not engaging, Low oil pressure?!
 

what about 10 W40?¿

Re: Vtec not engaging, Low oil pressure?!
 

codes mean 2 things


sensor is bad or wiring no if and inbetwween


oil aint gonna change ----

Re: Vtec not engaging, Low oil pressure?!
 

it's not the wiring or the scensor......oil pressure is what engages vtec, the solinoid just lets the oil flow thru. it is working and is not clogged. I took the turbo off and blocked the oil feed line and everything is normal....so why am I having problems with the oil pressure?! My guage reads 6psi idle-500-725rpm (hot) and tops at about 65psi7000rpm. cold its idle psi is 20-25 and tops at about 75. is that pretty normal. My other accord is about the same.

Re: Vtec not engaging, Low oil pressure?!
 

oil pressure is what the solenoid USES to engage vtec. If the sensor is bad, or the wiring is bad, the sensor will not operate the solenoid. I'll bet $100 that Chris is 100% correct.