93 honda prelude, h22a, when the motor is cold it doesnt engage,naturally, but when it is warm, not at operating temp it engages strong, but when it starts to get up to operating temp it starts to cut out and then at full operating temp it doesnt engage at all, i have replaced the solenoid and the oil pressure switch, and the oil pump, the ohms between, the solenoid, and the pressure switch wires is fine and all the grounds are good, and i manually tested the solenoid, and it engages every time just fine, so if anyone can give me advise and what to do next i would appreciate it


Modified by Mathew_prelude93 at 6:13 PM 9/26/2006

 

wow what are the chances, I have the same year prelude and engine but, my vtech doesn't even engage. I check both wire and ground but vtech don't work i'm going crazy.

 

there is no h!

might wanna get a oil pressure gauge and make sure your getting enough oil pressure to engage vtec.

 

man its been awhile since i saw someone post vtecH instead of VTEC.

https://honda-tech.com/zerothread?id=830163

vtec is based off oil pressure. the engine doesnt produce enough oil pressure when its cold in order to lock the vtec rocker arm.

 

h22's dont have vtech

 

h22a does

 

h22's have VTEC

Vtech is a phone company

 

They dont have SILENOID's either.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by godslayer &raquo;</TD></TR><TR><TD CLASS="quote">They dont have SILENOID's either.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by godslayer &raquo;</TD></TR><TR><TD CLASS="quote">They dont have SILENOID's either.</TD></TR></TABLE>

I read that as: Sillynoids.



BTW, also check your thermostat.

 

First of all, you need to figure out where your oil is going if you are going to keep trying to "test" vtec.

Secondly, you say your vtec wire is hooked up - how about the other wire that goes to the vtec pressure sensor? Is the ground of the solenoid hooked up?

 

yep all hooked up


Modified by Mathew_prelude93 at 10:51 AM 9/26/2006

 

Check your oil pan for dents, and your oil level.

 

i would def check oil level....

 

make sure the solenoid is clean too sometime it gunks up just clean the screen on it

 

how would dents effect the vtec, i mean unless they were big dents, but would llittle ones effect it too