i was wondering if by applying a switch 12v source of power to the vtec solenoid then could i have vtec engaged all the time. this would benefit me because the motor is turbo and it spools way before vtec engages and i would like the gap closed up. by having vtec engaged all the time would this do any harm to the lma's or any components to the head.

also right now vtec will engage for just second gear then when i shift into third it does not engage it was working just yesterday. i do not have any codes right now accept for a iat sensor which would not cause this problem and also i checked all wires and o2 sensor and oil leve. so if i can engage it all the time it would kill two birds with one stone. thanks please some of you veterens please respond. I would like a positive answer not just well it should work and not break anything. thanks

 

Fix what you know is wrong first. i dont know if Vtec engauged at all times on a turbo would benefit, but I doubt it.

 

im not sure why it is that vtec wont engage. everything appears to be ok and the same as yesterday. the only thing i have not done yet is replaced the solenoid. but i dont think i have another one. someone answer if it will harm anything having it engaged all the time????

 

If you just plug it in your over looking the problem here. Find out why it isnt engauging.

Sometimes certain ECU codes will disable Vtec from Engauging.

You will most likely lose power by just plugging Vtec in. I wouldnt do it.
Vtec needs a certain ammount of oil pressure to function properly, and at Idle it wont work good, thats why its set to function around 5k.

 

Don't do it, it's not designed to work that way. Maybe if you went in a permanently locked all the pins, but it does need that oil pressure to work like Acid said, so who knows what is going to happen at idle when the pressure is too low.

Having those big cam lobes at lower rpms probably isn't going to help a lot anyway.

 

as far as losing power i dont care this car makes plenty of it and the turbo is a dual bb and spools by 2800 so no poblems there. but if there would be a problem with locking all the pins in for the big lobe. then no i dont want to do it. i just dont get it. there is no trouble codes. how can i test the solenoid.

 

If you physically locked the pins I would think it would be OK, but just electronically activating the VTEC solenoid all the time would be bad IMO.

You have a Helms manual? That should have all the testing procedures...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tofast4uh22 &raquo;</TD></TR><TR><TD CLASS="quote">spools by 2800</TD></TR></TABLE>
it won't if you're locked in vtec at 2800, there won't be enough exhaust gas velocity to spool the turbo.


iirc, with the solenoid electronically engaged, it still takes over 40psi oil to actually engage the pins, and and almost every honda i've ever seen doesn't make 40 at idle.

on that note, the way that the vtec engages, you want it to engage fully and quickly.(talking about the speed of the vtec actuator pin, not rpm)
if it only halfass engages due to low oil psi, it's bound to eat the fingers right up


Modified by vlang29 at 6:59 PM 7/15/2008

 

Its simple. Take a 12v wire and hook it up to your solenoid. make sure the engine is reving high, like 5kish and then connect the 12v source. That will let you know the out come.

 

have you guys ever seen or heard of a solenoid that fails like this. it will let vtec engage one time and thats it. then i can shut the car off and let it sit then test drive again and vtec will engage one time then thats it. but not trouble codes.

 

is it rev-cutting at 6500?

 

yes it is

 

and i have the pressure sensor bypassed and it still does this.

 

what im thinking about doing is hooking up a led light to the solenoid and putting it in the car. then doing a few pulls until it stops engaging then look to see if the led is lit up after 5k if it is not then i think my problem is wiring or ecu oriented. if the led is lit up then i think i might have a oil pressure problem or solenoid problem. tell me what you think!!

 

sounds good

 

i have checked everything. and i cant find the problem. could there be something wrong with the lma's after the machine shop rebuilt the head. thanks

 

will removing the airbag effect my vtec?

 

No, but you should do it anyway, and while your at it, take your seat belts out to.

 

so i take it you think its a stupid idea. well i putting a quick release in thats why.

 

Not that its stupid. Just in the wrong topic. the airbags are part of the SRS system, and have nothing to do with the mechanics of how Vtec works, or any part of the motor or transmission.

 

i had heard that and wondered if it was true and it looked like in the forum like you know what your talking about well cool thanks my worries are over from that stupid rumor.

 

i had heard that and wondered if it was true and it looked like in the forum like you know what your talking about well cool thanks my worries are over from that stupid rumor.

 

well i think i have to pull the head off. im thinking that the machine shop screwed something up when putting my head back together after doing a valve job, guides, retainers dual valve springs and seals, p&p and so on. do you guys no what they could have assembled wrong. this is the only part of the motor i left to someone else cause i dont know whats going on in this head and they [freak] it up. i have checked everything and can not get vtec to manually engange and the ecu is sending voltage to the solenoid and the solenoid is good and i do have good oil pressure. but i cant figure it out. please let me know what to look for once i get it off. cause im just going to put another head on that i have.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">Its simple. Take a 12v wire and hook it up to your solenoid. make sure the engine is reving high, like 5kish and then connect the 12v source. That will let you know the out come.

</TD></TR></TABLE>

Have you tried that yet?

 

for your iat sensor.