T.J.

My motor is not switching over from low cam to high cam Vtec. The motor is a poor mans type r, obd2. Im not throwing any cells for no vtec. The only cell i am throwing is o2 sensor which would not effect your vtec. Ive checked my oil level, solenoid , switched out solenoid's, wiring, the voltage on the solenoid, and voltage on my oil pressure switch. Everything was fine and i just cant figure out what the problem is. Ive come to the conclusion Ive probably got a problem internally in the head, but im not sure what to look for. Any help you guys could give me would really help out.

goodbyegti

would the o2 sensor code put the ecu into 'limp mode' and disable VTEC? just a thought, i'm not sure and could be wrong...

Archidictus

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by goodbyegti &raquo;</TD></TR><TR><TD CLASS="quote">would the o2 sensor code put the ecu into 'limp mode' and disable VTEC? just a thought, i'm not sure and could be wrong...</TD></TR></TABLE>

Bingo. Oxygen sensor malfunction (heater circuit malfunction or whatever) will put your car into limp mode. You have no VTEC in limp mode.

hadehatch

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

Bingo. Oxygen sensor malfunction (heater circuit malfunction or whatever) will put your car into limp mode. You have no VTEC in limp mode.</TD></TR></TABLE>

this may be true for obd2 which i am not to familiar with.. but i know for a fact that my stock p28 ecu didnt disable vtec when my o2 sensor was not plugged in...

do you have enough oil in the engine and did you let it warm up? just making sure..
also check the screen filter for the vtec solinoid and make sure its clean.. it might not be letting oil through...

T.J.

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

Bingo. Oxygen sensor malfunction (heater circuit malfunction or whatever) will put your car into limp mode. You have no VTEC in limp mode.</TD></TR></TABLE>

I could understand that but the only problem is it still does it even with my EMS

T.J.

Also i do have Vtec at low cam when i moved my engagement point down to 4000 rpms my vtec would kick in it just will not switch over to my high cam.

2000CX

with an o2 out obd2 does strange things. when my secondary was out i could not get into vtec period...granted this is on a stock everything set up...no after market management or anything.

stackz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cake-boy &raquo;</TD></TR><TR><TD CLASS="quote">Also i do have Vtec at low cam when i moved my engagement point down to 4000 rpms my vtec would kick in it just will not switch over to my high cam.</TD></TR></TABLE>

eh? vtec at low cam? there is no vtec at low cam....just low cam

you said you did the poor man's type-r? what is this setup? ls block w/vtec head? did you take out that oil squirter block-off in the block so the oil can physically flow up to the head??

T.J.

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

eh? vtec at low cam? there is no vtec at low cam....just low cam

you said you did the poor man's type-r? what is this setup? ls block w/vtec head? did you take out that oil squirter block-off in the block so the oil can physically flow up to the head??</TD></TR></TABLE>


A Poor man's type-r is a GSR block with a b16 head , If i had used a Ls block my motor would have been an ls vtec

T.J.

anybody else

stackz

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


A Poor man's type-r is a GSR block with a b16 head , If i had used a Ls block my motor would have been an ls vtec</TD></TR></TABLE>

well hiss to you too

since you've tried everything with the solenoid and wiring that you can think of why dont you go ahead and fix the o2 sensor problem and see what happens.

mrbsponge

Just a note, im running an obd2 gsr motor on a p72 obd1 computer with no 02 and mine still hits vtec.

Built to Spill

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stackz &raquo;</TD></TR><TR><TD CLASS="quote">
since you've tried everything with the solenoid and wiring that you can think of why dont you go ahead and fix the o2 sensor problem and see what happens.</TD></TR></TABLE>

agreed. i think this will help you out more than you think.

RTE117

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2000CX &raquo;</TD></TR><TR><TD CLASS="quote">with an o2 out obd2 does strange things. when my secondary was out i could not get into vtec period...granted this is on a stock everything set up...no after market management or anything.</TD></TR></TABLE>

I have my primary O2 pulled and wrapped in foil in my bay. Hasn't affected anything that I've noticed but it's still hooked up/working, getting ready to put it back in with my new header though. But he should try to get any CEL's off. What type of EMS or piggyback is he running?

1hotcivicSi

vtec will still pop thats not your problem .......... but i have no idea not exactly a pro at this but i had 3 cel's on my obd2 and my vtec still hit

hadehatch

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

I have my primary O2 pulled and wrapped in foil in my bay. Hasn't affected anything that I've noticed but it's still hooked up/working, getting ready to put it back in with my new header though. But he should try to get any CEL's off. What type of EMS or piggyback is he running?</TD></TR></TABLE>

Having your o2 sensor hanging around in your engine bay will cause your car to run extremely rich since its not reading any exhaust in the air... It's better to unplug it completely until you are ready to fix the problem, at least your ecu will use a default fuel map instead of trying to up the fuel to compensate for all the o2 its reading out of the engine bay..

I've had plenty of experience with people running their cars like this since a local shop does butcher work like that... I don't recommend it.

RTE117

Yeah, I did it because someone sent me the wrong manifold. So I just wrapped it, I can't wait to get the header in and get that CEL off.

hadehatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IDriveAHonda &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, I did it because someone sent me the wrong manifold. So I just wrapped it, I can't wait to get the header in and get that CEL off.</TD></TR></TABLE>

I was saying that wrapping it would cause more problems than just unplugging it.. If you plan on driving it like that you should just unplug it. Leaving it exposed to air will make the car think the exhaust is VERY lean and it will dump gas into your motor.

goodbyegti

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

I was saying that wrapping it would cause more problems than just unplugging it.. If you plan on driving it like that you should just unplug it. Leaving it exposed to air will make the car think the exhaust is VERY lean and it will dump gas into your motor.</TD></TR></TABLE>

I'm pretty sure they have to be hot before they work so it wont read anything in the bay and will probably cause it to run a preset map anyway...

T.J.

yeah Ive been running without my Secondary O2 for a long Ive run test pipes many times with no problem. And vtec was working with the O2 sensor cell on, And them for some reason my vtec just stopped engaging.

T.J.

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

I have my primary O2 pulled and wrapped in foil in my bay. Hasn't affected anything that I've noticed but it's still hooked up/working, getting ready to put it back in with my new header though. But he should try to get any CEL's off. What type of EMS or piggyback is he running?</TD></TR></TABLE>


Im running Aem's Ems

hadehatch

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

I'm pretty sure they have to be hot before they work so it wont read anything in the bay and will probably cause it to run a preset map anyway...</TD></TR></TABLE>

only obd0 cars have non heated o2 sensors...

T.J.

any buddy else?

goodbyegti

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

only obd0 cars have non heated o2 sensors...</TD></TR></TABLE>

heated or not it still has to get hot before it works

T.J.

put on my cat and reattached my 02 sensor just to try and see if it would work, cell is gone but still no vtec.