Katman? No JDM VTEC pressure switch?
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From: Greetings From Asbury Park,, NJ
Katman? No JDM VTEC pressure switch?
Are there, or have there ever been, ANY VTEC engines made anywhere, that DIDN'T use the pressure switch to activate VTEC engagement?
98 and up JDM's?
Katman?
98 and up JDM's?
Katman?
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From: Zoo York
Re: Katman? No JDM VTEC pressure switch? (99blackcivicSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99blackcivicSi »</TD></TR><TR><TD CLASS="quote">did it have Vtec killers in it to do away with Vtec so it plugged it up because it infact became uneccesary?</TD></TR></TABLE>
no... it was a bone stock motor
no... it was a bone stock motor
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From: Greetings From Asbury Park,, NJ
Re: (egsleepercivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by egsleepercivic »</TD></TR><TR><TD CLASS="quote">I do beleive that some JDM vtec motors do not have vtec pressure switches, which ones, can't help you there, but I have heard this before</TD></TR></TABLE>
If what you are saying is true and, I'm not saying it's not. Then what exactly engages the VTEC rockers locking pins, if it's not oil pressure? On those motors.
Something has to push the high lift cams locking pins into place.
If what you are saying is true and, I'm not saying it's not. Then what exactly engages the VTEC rockers locking pins, if it's not oil pressure? On those motors.
Something has to push the high lift cams locking pins into place.
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Mad Scientist
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From: tallafizzy, FL state
Re: (4crx4me)
OBD2 jdm motors dont have it.....
Oil still engages vtec, there is just no pressure switch.
the vtec pressure oil switch does not engage vtec, it only tells the ecm that there is actual pressure; what engages vtec is the solenoid.
Oil still engages vtec, there is just no pressure switch.
the vtec pressure oil switch does not engage vtec, it only tells the ecm that there is actual pressure; what engages vtec is the solenoid.
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From: Greetings From Asbury Park,, NJ
Re: (mmuller)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller »</TD></TR><TR><TD CLASS="quote">OBD2 jdm motors dont have it.....
Oil still engages vtec, there is just no pressure switch.
the vtec pressure oil switch does not engage vtec, it only tells the ecm that there is actual pressure; what engages vtec is the solenoid.</TD></TR></TABLE>
See, I learn something here everyday. 
So, is it all OBD2 engines without a pressure switch? Or just some?
Oil still engages vtec, there is just no pressure switch.
the vtec pressure oil switch does not engage vtec, it only tells the ecm that there is actual pressure; what engages vtec is the solenoid.</TD></TR></TABLE>
See, I learn something here everyday. So, is it all OBD2 engines without a pressure switch? Or just some?
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From: Northern VA, USA
Re: (XratedSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XratedSi »</TD></TR><TR><TD CLASS="quote">Like when the car is cold. Vtec wont work on the usdm solenoid, on mine it will work from the time i start the car, as long as theres adequate oil pressure </TD></TR></TABLE>
How will the ecu know if there is adequate oil pressure if there is no oil pressure switch??
</TD></TR></TABLE>How will the ecu know if there is adequate oil pressure if there is no oil pressure switch??
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Re: (XratedSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XratedSi »</TD></TR><TR><TD CLASS="quote">Like when the car is cold. Vtec wont work on the usdm solenoid, on mine it will work from the time i start the car, as long as theres adequate oil pressure </TD></TR></TABLE>
I guess my oil pressure wouldn't matter
*edit* yes it would...you still need oil pressure for vtec
</TD></TR></TABLE>I guess my oil pressure wouldn't matter
*edit* yes it would...you still need oil pressure for vtec
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From: salem, or, usa
Re: (turboxsi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboxsi »</TD></TR><TR><TD CLASS="quote">
How will the ecu know if there is adequate oil pressure if there is no oil pressure switch??</TD></TR></TABLE>
There is a oil pressure sensor like usual! It goes off of that instead!
How will the ecu know if there is adequate oil pressure if there is no oil pressure switch??</TD></TR></TABLE>
There is a oil pressure sensor like usual! It goes off of that instead!
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From: B.F.E., CA, United States
Re: (mattssi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattssi »</TD></TR><TR><TD CLASS="quote">
There is a oil pressure sensor like usual! It goes off of that instead! </TD></TR></TABLE>
you took the words right out of my mouth! every motor honda makes, or every other company for that matter, has an oil press. sensor.
There is a oil pressure sensor like usual! It goes off of that instead! </TD></TR></TABLE>
you took the words right out of my mouth! every motor honda makes, or every other company for that matter, has an oil press. sensor.
I believe you are both wrong.
To use a USDM ecu or an ecu that looks for Vtec Oil Pressure without a VOP sensor:
Jump the vtec oil pressure wire on the ecu side to vtec solenoid on the ecu side of the harness.
Supposivly it tricks the ecu or some bs. I have never done it but I have heard it works.
To use a USDM ecu or an ecu that looks for Vtec Oil Pressure without a VOP sensor:
Jump the vtec oil pressure wire on the ecu side to vtec solenoid on the ecu side of the harness.
Supposivly it tricks the ecu or some bs. I have never done it but I have heard it works.
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From: bay area
Re: (mtber)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber »</TD></TR><TR><TD CLASS="quote">
To use a USDM ecu or an ecu that looks for Vtec Oil Pressure without a VOP sensor:
Jump the vtec oil pressure wire on the ecu side to vtec solenoid on the ecu side of the harness.
Supposivly it tricks the ecu or some bs. I have never done it but I have heard it works.</TD></TR></TABLE>
correct.. at least to my knowledge! i have a jdm d15b, and it did not come with a vtec oil pressure switch... i needed (wanted) to run vtec, so i spliced the wire going into the switch into the vtec solenoid... the exact pinouts and color i am unsure of at the moment...
this will probably solve all disputes: https://honda-tech.com/zerothread?id=686379
and for the lazy: <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECVillain »</TD></TR><TR><TD CLASS="quote">
The way to use the JDM VTEC solenoid with a USDM ECU or any ECU that looks for a VTEC pressure switch is to run the wire from D6 (VTEC Pressure Switch) and tap it into A4 (VTEC Solenoid). This connects the pressure switch and VTEC solenoid circuit together which fools the ECU so it won't throw a CEL.
The first setup that I wired this way was a friend's car (95 DX with 98 JDM B18C + JRSC). It has been running flawlessly for nearly 2 years and sees it's fair share of abuse. There have be no side effects from this that I have seen nor have I ever heard anyone else that has had problems.</TD></TR></TABLE>
To use a USDM ecu or an ecu that looks for Vtec Oil Pressure without a VOP sensor:
Jump the vtec oil pressure wire on the ecu side to vtec solenoid on the ecu side of the harness.
Supposivly it tricks the ecu or some bs. I have never done it but I have heard it works.</TD></TR></TABLE>
correct.. at least to my knowledge! i have a jdm d15b, and it did not come with a vtec oil pressure switch... i needed (wanted) to run vtec, so i spliced the wire going into the switch into the vtec solenoid... the exact pinouts and color i am unsure of at the moment...
this will probably solve all disputes: https://honda-tech.com/zerothread?id=686379
and for the lazy: <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECVillain »</TD></TR><TR><TD CLASS="quote">
The way to use the JDM VTEC solenoid with a USDM ECU or any ECU that looks for a VTEC pressure switch is to run the wire from D6 (VTEC Pressure Switch) and tap it into A4 (VTEC Solenoid). This connects the pressure switch and VTEC solenoid circuit together which fools the ECU so it won't throw a CEL.
The first setup that I wired this way was a friend's car (95 DX with 98 JDM B18C + JRSC). It has been running flawlessly for nearly 2 years and sees it's fair share of abuse. There have be no side effects from this that I have seen nor have I ever heard anyone else that has had problems.</TD></TR></TABLE>
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From: Texas
Re: (mtber)
Think of it like adding a VTEC controller to a car equiped with a non-VTEC ecu. Example: LS/VTEC, using a LS ecu. The Controller sends the output to activate the solinoid. It doesnt care about oil pressure.
I have noticed that all the OBD2 JDM R motors I seen and delt with do not have the Vtec oil pressure switch.
I have noticed that all the OBD2 JDM R motors I seen and delt with do not have the Vtec oil pressure switch.
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From: PASADENA, CA, USA
yes, all JDM OBD2 B-series engines do not have a VTPS, but all US OBD2 b-series engines do indeed have a VTPS.
And as stated above, if you have a JDM OBD2 B engine and you need the VTPS you have 2 options:
1 - find yourself any US VTEC solenoid and apply/replace the one on your JDM OBD2 engine with the US solenoid.
or
2 - [this trick DOES work] Simply take VTPS power wire and splice it into the single VTEC Solenoid wire. Ground the black wire somewhere on the side of the head and presto....you gotta working VTPS and no check engine light.
As far as VTEC controllers go, the FIELDS SFC VT controller totally ignores the VTPS sensor. I'm not sure about APEXi VAFC though.
And as stated above, if you have a JDM OBD2 B engine and you need the VTPS you have 2 options:
1 - find yourself any US VTEC solenoid and apply/replace the one on your JDM OBD2 engine with the US solenoid.
or
2 - [this trick DOES work] Simply take VTPS power wire and splice it into the single VTEC Solenoid wire. Ground the black wire somewhere on the side of the head and presto....you gotta working VTPS and no check engine light.
As far as VTEC controllers go, the FIELDS SFC VT controller totally ignores the VTPS sensor. I'm not sure about APEXi VAFC though.
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From: Wellington, New Zealand
Re: (Katman)
hey guys,
sorry bout dragging this post up again, ive come 2 do my conversion now and run into this hole ECU trick swap thing,
couple of things here im bit confused about wheres teh single vtec solinoid wire, im sure mines 2 wires, which one do i splice? do i just test which one has power coming out of it with a multimeter and ground the other one?
Regards
sorry bout dragging this post up again, ive come 2 do my conversion now and run into this hole ECU trick swap thing,
couple of things here im bit confused about wheres teh single vtec solinoid wire, im sure mines 2 wires, which one do i splice? do i just test which one has power coming out of it with a multimeter and ground the other one?
Regards