it has been a month now and I still have no vtec since installing my ls/vtec. I have taken apart the plumbing and cleaned it (made sure of no obstruction), I have replaced the solonoid twice, and I have even gone threw Kamin's "vtec trouble shooting guide" https://honda-tech.com/zerothread?id=164863 I fixed several problems but am still throwing a MIL 21 I have only two options in my opinion left a vtec wiring harness obd-1, and try a different ecu. Has anyone ever delt with anything this bazzare before?

P.S. All of the wiring is going in the right spots needed.

thanks
mike

 

when you put your motor together did you forget to put in that little "vtec" piston in the dead center of the head back in? they are just so small, sometimes people forget to put them back in.

 

Don't loose them either, they're a bitch to replace.....have to buy the whole rocker assembly!!!

 

does anyone have a pick of this piston or where it is located?

 

if you pull the filter off the solenoid (the 3 bolts on the top of solenoid) its a bronze cylinder with a small indent in it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jazzyfoo &raquo;</TD></TR><TR><TD CLASS="quote">when you put your motor together did you forget to put in that little vtec piston in the dead center of the head back in? they are just so small, sometimes people forget to put them back in.</TD></TR></TABLE>


does anyone have a diagram or pic to show me where these little pistons are?

 

up for more knowledge

 

Kamin is correct about the piston in the vtec solnoid aswell, but i was refering to the piston under your middle cam cap that goes over both the intake and exaust cam. there is a little cylinder looking thing under that that is essential for vtec. very small and easy to lose.

 

its the little circle between the spark plug chambers 2 and 3, hope that helps some.

Modified by jazzyfoo at 4:59 AM 4/17/2003


Modified by jazzyfoo at 5:00 AM 4/17/2003

 

thanks I will take a look at that today... I am also going to check the whole rocker assembly to see if it was all put back in.

 

That is just a dowel with an oring.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jazzyfoo &raquo;</TD></TR><TR><TD CLASS="quote">when you put your motor together did you forget to put in that little "vtec" piston in the dead center of the head back in? they are just so small, sometimes people forget to put them back in.</TD></TR></TABLE>

are you talking about the two pistons that go in every rocker arm or the intake and exhaust shaft orfices located near the timing belt?

 

I think he's referring to the dowel/o-ring in the center of the head, like psi420 said. Vtec won't engage if its missing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infamousLSVTEC &raquo;</TD></TR><TR><TD CLASS="quote">does anyone have a pick of this piston or where it is located?</TD></TR></TABLE>

yes here:

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jazzyfoo &raquo;</TD></TR><TR><TD CLASS="quote">

its the little circle between the spark plug chambers 2 and 3, hope that helps some.

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

well guess what boys... its missing I just pulled off my head it it was not there

so if I am missing this vtec will not work?

 

could work....add it and see what happens

 

funny thing is that it didnt come with my head when I bought it...

 

yea that little dowel pin is very important, try and see if it works when you put it back in. mabye that was it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jazzyfoo &raquo;</TD></TR><TR><TD CLASS="quote">yea that little dowel pin is very important, try and see if it works when you put it back in. mabye that was it...</TD></TR></TABLE>

Well, yes and no.

Some heads come with them and some don`t, some run vtec fine w/o it and others don`t run at all, it`s a mystery as far as I`m concerned....

 

That orfice is to control oil flow to the head and valve train only. it has nothing to do with v-tec operation.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HONDADNA &raquo;</TD></TR><TR><TD CLASS="quote">That orfice is to control oil flow to the head and valve train only. it has nothing to do with v-tec operation. </TD></TR></TABLE>Which in turn =oil pessure=VTEC.....

Like I said, nobody can give a straight answer on this..

 

hmm this is interesting, never knew this was such a heated debate. hmm, well just try and put it in. who knows...

 

I put the piece in and nothing... but then I tried swapping ecu's with my buddys SI and his car threw the same code 21. We have used a p28 in his car before and have had no problems so I am convinded it was just the ecu the whole time...

thanks
mike