G U E C O

hey i wired my friends vtec today and it doesnt want to engage. i wired the a4 to vtec solenoid, d6 to vtec pressure switch, and the other wire on the vtec pressure wire to the chassis. i even tried to test vtec manual with a button, vtec still doesnt want to kick in. i performed a test light and the wires were in the right place and activated. i didnt hook up the knock sensor to d3 cause i thought it wasnt necessary to wire it becuase he has a p28 with a disabled knock sensor. is this why vtec isnt kick in? he has a bone stock b18c1 with a skunk2 intake manifold.

i even tried the use my cousins p28 (still no luck)

both p28's are chipped for DOHC

there is no CEL turning on (jsut wanted to point this out)
your reward is a for helping

EDIT: i has a brand new screen

Modified by stock93cx at 1:53 AM 1/24/2004


Modified by stock93cx at 1:19 PM 1/24/2004

Maintenance

Check to see if your vtec solenoid is still good. You can do that with the engine off by touching the wire that leads to a4 to a 12v. You should here it click. IF you already did that then disregard my comment.

G U E C O

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racerxfear &raquo;</TD></TR><TR><TD CLASS="quote">Check to see if your vtec solenoid is still good. You can do that with the engine off by touching the wire that leads to a4 to a 12v. You should here it click. IF you already did that then disregard my comment. </TD></TR></TABLE>

my vtec soleniod is clicking so thats a good sign

2lua

check your ground and engine oil at proper level and temp... with a p28 your vtec would come on around 5500 rpm. if your ecu prgram got knock disable then you don't have to wire that knock sensor. and if you do wire the knock sensor yoru need to use a shielded wire for the knock sensor.

G U E C O

checked and checked. everything is perfect. damn why wont my damn vtec kick in. i searched but i cant find out why my vtec wont work

WAFFLES

vtec operates off of
a)engine temp
b)oil pressure
c)rpm
d)speed


All I can think of is VSS(but you said no check engine lights), bad solenoid, bad oil pressure, or your ecu is not working correctly.

G U E C O

check and did it all

everything is factory new and ecu is working fine cause i tried it in my friends car and it engaged, i also tried it with his p28 and no vtec. so i guessing its the wires, but i pluged it in the right spot. damn this is pissing me off

WAFFLES

do you have any oil leaks?

I'm wondering what kind of oil pressure you have.

G U E C O

no leaks, how can i tell about my oil pressure?

WAFFLES

you need a oil pressure gauge

recheck the wiring first. I had the pressure sensor pin loose in the ecu plug and that was causing a similar problem....It's always the stupid little ****.

Do your wires have any cuts or rips in them?

JD_B18CDX

Hook up the a multimeter to the ECU vtec out.
Drive around and rev to rpm where vtec engages.
See if tester register any voltage. (Trying to isolate if ECU wont engage vtec OR the new wire you installed is not connected properly).

if no voltage then check oil presuse

If there is voltage then check for continuity of vtec wire from ECU to solenoid.

G U E C O

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WAFFLES &raquo;</TD></TR><TR><TD CLASS="quote">you need a oil pressure gauge

recheck the wiring first. I had the pressure sensor pin loose in the ecu plug and that was causing a similar problem....It's always the stupid little ****.

Do your wires have any cuts or rips in them?</TD></TR></TABLE>
no the wires seem to be perfect, i did a test light on all of them and they all seem to be working. there was no indication of lost connections

G U E C O

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JD_B18CDX &raquo;</TD></TR><TR><TD CLASS="quote">Hook up the a multimeter to the ECU vtec out.
Drive around and rev to rpm where vtec engages.
See if tester register any voltage. (Trying to isolate if ECU wont engage vtec OR the new wire you installed is not connected properly).

if no voltage then check oil presuse

If there is voltage then check for continuity of vtec wire from ECU to solenoid.
</TD></TR></TABLE>

i did that, there was no signs of voltage change. what should i do now?

G U E C O

anyone?

Mr HYDE

probably stupid but is the speedo registering the car is moving. if not the car isnt knowing that the car is moving and wont engage vtec. this happened to my friends car he never hooked up the speedo sensor and we couldnt figure out why it wasnt turning over.

G U E C O

yes my speedo is working

G U E C O

ttt