TURBOFTW

iTrader: (1)

Ok i have a newly built LSVTEC...heres the problem i have no vtec, ive searched and searched even viewing the post about vtec troubleshooting by kamin and still i can not figure it out...heres what ive done so far...

-changed oil : 10w30 topped off
-installed oil pressure guage at 3,000 rpm i get around 55-60 psi
-no dent in oil pan
-new oil filter
-cleaned oil pickup tube again
-vtec noid clicks when hard wired
- NO check engine lights
- ive tried 2 different ecu's

help me please, im stumped

menkio

what ecu are you running ?

TURBOFTW

iTrader: (1)

reprogrammed p28 that i had on another car vtec worked on the other motor

Kamin

doublecheck continuty between the ECU pin for vtec and the solenoid plug itself, you could have a break in the wire.

TURBOFTW

iTrader: (1)

I acutally ran 3 separate wires one for a ground and 2 inside directly to the ecu...i thought it was that to

misdirected

i dont know if he could help but i have a friend who helps me with all my hard probs. if you want to talk to him you can contact him on our website. http://www.shadow-racers.com hope this will help his name is frank.

Turbogixxer

The oil line for Vtec kinked or blocked?

TURBOFTW

iTrader: (1)

link isnt working...thx though im glad kamin chimed in on this, i took the line off and blew it out i even took off the vtec noid and every thing and blew air threw it, i cleaned the vtec screen and everything...

DemostheneZ

VTEC is overrated

Kamin

get a light you can wire inline with the solenoid. go for a drive, when vtec engages it should turn the light on. this will indefinatley eliminate any wiring problems. it HAS to be oil related if it lights up.

TURBOFTW

iTrader: (1)

hummm ill try and go do that right now....honestly i wasnt asking "do you think vtec is overrated" so if you could please keep your comments to your self or go make a new topic i would gladly appreciate it...thanks have a nice day

misdirected

more like a leavo.

ABK

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by misdirected &raquo;</TD></TR><TR><TD CLASS="quote">i dont know if he could help but i have a friend who helps me with all my hard probs. if you want to talk to him you can contact him on our website. http://www.shadow-racers.com hope this will help his name is frank. </TD></TR></TABLE>

This is funny, it's like a big gathering of ricers.

What pins did you use to wire the vtec? it's a a4 for selonoid, and d6 for pressure switch. Also check for vtec, hook up a voltmeter or some sort of a tester to the a4 wire/pin and see if you get 12Vs when you are supposed to hit vtec (BTW it's supposed to be 12+). If you don't then your ecu is bad, or vtec pressure switch is broken. Try different ECU, if that doesn't work just hardwire the vtec pressure switch, run ground to d6 (double check that method because I don't remember if you can do that).

Also it's a good idea to take off the vtec solenoid and clean the oil passages.

Also remember you got to meet some conditions for vtec to work: motor must be warm, you must be going over certain MPH, oil pressure must be high enough.

And who chipped you ECU?

TURBOFTW

iTrader: (1)

Ive tried all of what u said....i stated it above in my last posts the only thing i didnt try was the voltmeter and as far as the ecu I know for a fact it works its been in my last 2 cars....i do let it warm up, i check my oil level constantly to make sure its topped, i ran all my wires directly to each pin slot for the ecu iand i have NO ecu codes or check engine light...i appreciate your help

TURBOFTW

iTrader: (1)

ok guys i think im a try running a light and seeing if the light turns on when vtec is supposed to engage...that was a good idea by kamin...and then do you guys think i should tear my head apart

realblag

Does your ecu know what temperature the engine is at? Is your speed sensor working correctly?

TURBOFTW

iTrader: (1)

speed sensor is working..... the temp guage rises so i hope its working

TURBOFTW

iTrader: (1)

i tired the trick with the light and it does turn on... when vtec is supposed to hit im getting around 75-80 psi

Kamin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22dude &raquo;</TD></TR><TR><TD CLASS="quote">i tired the trick with the light and it does turn on... when vtec is supposed to hit im getting around 75-80 psi</TD></TR></TABLE>
thats right where it should be for pressure.

odd...i alsmot want to say you ran your oil lines wrong. but im not an LSvtec expert so i couldnt even begin to look at that.

chad

does oil pressure drop when the VTEC LIGHT you hooked up turns on?

OIL PRESSURE WILL DROP when youhit vtec yo.....i bout pissed my pants first time i hit vtec and was watching oil pressure guage.....

ABK

yeah I don't think he would run his oil lines wrong because vtec would not be trigered by ECU, since oil pressure switch would read no pressure. This is weird, I would suggest doing two last things before going and ripping your head apart. Take of the whole vtec solenoid assembly and clean the ports. If it doesn't help try getting another vtec solenoid aseembdy and see if it will help you. There were cases of solenoid getting seized up.

Kamin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chad &raquo;</TD></TR><TR><TD CLASS="quote">does oil pressure drop when the VTEC LIGHT you hooked up turns on?

OIL PRESSURE WILL DROP when youhit vtec yo.....i bout pissed my pants first time i hit vtec and was watching oil pressure guage.....</TD></TR></TABLE>
stunna-chad is correct, with a huge increase of flow into the valvetrain pressure will drop.

TURBOFTW

iTrader: (1)

Hey guys thanks for posting i had gotten bummed about this so i went and saw that stupid borne supremacy (sp?) anyways now that i think of it no the pressure did not drop when vtec was supposed to hit....i did try multiple vtec noids and blew then out with air to be sure they were not dirty, oh and i did block off the proper hole i was supposed to in the head..i forgot to say

TURBOFTW

iTrader: (1)

Any other advise? do you think my LMA's are bad? as far as mechanical wise what should i look for or do?....i just wanted to say thanks for any, and the help you have given me thus far, its just a process of illimination and im breaking it down pretty quick here...

TURBOFTW

iTrader: (1)

anybody