P73 in a 95 civic
06-29-2003, 07:14 PM
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P73 in a 95 civic
I have a P73 to match my 99 jdm itr motor. I have a obd1 to obd2 jumper harness. Will this approach cause any engine code to be thrown or will it be straight. Any problems with my application or am I safe? Any advise on this swap would be nice. It going to be all motor.
06-29-2003, 07:26 PM
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Re: P73 in a 95 civic (turkdog)
is it a jdm ecu? as far as I know you shouldn't have to add any sensors like a normal obd2 ecu since your p73 is jdm. I'd like to hear someone elses opinion.
06-29-2003, 07:32 PM
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Re: P73 in a 95 civic (turkdog)
I believe it should be plug and play using the jumper harness. I'm not positive so I'd like to hear someone say it.
06-30-2003, 09:59 AM
#5
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Re: P73 in a 95 civic (turkdog)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turkdog »</TD></TR><TR><TD CLASS="quote">I have a P73 to match my 99 jdm itr motor. I have a obd1 to obd2 jumper harness. Will this approach cause any engine code to be thrown or will it be straight. Any problems with my application or am I safe? Any advise on this swap would be nice. It going to be all motor.</TD></TR></TABLE>
yes, it should be plug n' play without any check engine lights, if the jumper was made correctly.
You should have an OBD2b (99-00)-->OBD2a(96-98) ..since all JDM (96-00) P73 ecu's are OBD2a plug style.
yes, it should be plug n' play without any check engine lights, if the jumper was made correctly.
You should have an OBD2b (99-00)-->OBD2a(96-98) ..since all JDM (96-00) P73 ecu's are OBD2a plug style.
06-30-2003, 01:33 PM
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Re: P73 in a 95 civic (Katman)
thanks katman
Can you help me out on the spark plugs. I dont understand them very well.
my jdm itr came with PFR7G-11. THE HELM manual says to use PFR6G-11 and the deal sold me PFR5G-11 . All three of the plugs I mentioned are NGK What type of plug do you recommend for an stock all motor jdm itr. Whats the differences in the 7G, 6G, 5G. is 5 weak and 7 strong?
Can you help me out on the spark plugs. I dont understand them very well.
my jdm itr came with PFR7G-11. THE HELM manual says to use PFR6G-11 and the deal sold me PFR5G-11 . All three of the plugs I mentioned are NGK What type of plug do you recommend for an stock all motor jdm itr. Whats the differences in the 7G, 6G, 5G. is 5 weak and 7 strong?
06-30-2003, 05:01 PM
#7
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Re: P73 in a 95 civic (turkdog)
5, 6, 7 refer to heat range of the plug.
7 is known as a cold plug type, which is best to use on a high compression engine, such as your JDM-R engine. I suggest you buy some NGK 7G plugs though.
7 is known as a cold plug type, which is best to use on a high compression engine, such as your JDM-R engine. I suggest you buy some NGK 7G plugs though.
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07-01-2003, 06:20 PM
#8
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Re: P73 in a 95 civic (turkdog)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turkdog »</TD></TR><TR><TD CLASS="quote">its a jdm.</TD></TR></TABLE>
The early (pre-2000, I believe) P73 JDM ECU is basically an OBDI ECU with OBDII plugs. The pinout matches that of OBDII ECUs (without the extra OBDII sensors, of course). So if you have a jumper harness, it should work without problems. I recently wired my 1988 CRX to use a JDM P73 to run my B18C5. And it was no more difficult that wiring a 1992-1995 ECU. Just keep in mind that the JDM P73 uses neither an evaporative purge valve nor a VTEC pressure switch. So there are two less things to worry about.
The early (pre-2000, I believe) P73 JDM ECU is basically an OBDI ECU with OBDII plugs. The pinout matches that of OBDII ECUs (without the extra OBDII sensors, of course). So if you have a jumper harness, it should work without problems. I recently wired my 1988 CRX to use a JDM P73 to run my B18C5. And it was no more difficult that wiring a 1992-1995 ECU. Just keep in mind that the JDM P73 uses neither an evaporative purge valve nor a VTEC pressure switch. So there are two less things to worry about.
07-01-2003, 06:22 PM
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Re: P73 in a 95 civic (StorminMatt)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt »</TD></TR><TR><TD CLASS="quote">
Just keep in mind that the JDM P73 uses neither an evaporative purge valve nor a VTEC pressure switch. So there are two less things to worry about.</TD></TR></TABLE> could that be a reason my car isn't passing emissions at idle. I failed because all the fuel wasn't getting burned at idle.
Just keep in mind that the JDM P73 uses neither an evaporative purge valve nor a VTEC pressure switch. So there are two less things to worry about.</TD></TR></TABLE> could that be a reason my car isn't passing emissions at idle. I failed because all the fuel wasn't getting burned at idle.
07-01-2003, 06:25 PM
#10
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Re: P73 in a 95 civic (Ivan)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ivan »</TD></TR><TR><TD CLASS="quote"> could that be a reason my car isn't passing emissions at idle. I failed because all the fuel wasn't getting burned at idle.</TD></TR></TABLE>
No. The EVAP purge valve controls the flow of air though the charcoal canister. It helps to reduce emissions due to evaporation of fuel in the tank. But it does nothing for tailpipe emissions. If you are failing the tailpipe test at idle, look elsewhere. You could be running too rich. Or your cat could be bad. Oftentimes, it is the cat that is bad if you are failing at idle but passing at higher RPMs. At idle, the engine does not burn fuel as effectively as it does at speed.
No. The EVAP purge valve controls the flow of air though the charcoal canister. It helps to reduce emissions due to evaporation of fuel in the tank. But it does nothing for tailpipe emissions. If you are failing the tailpipe test at idle, look elsewhere. You could be running too rich. Or your cat could be bad. Oftentimes, it is the cat that is bad if you are failing at idle but passing at higher RPMs. At idle, the engine does not burn fuel as effectively as it does at speed.
07-03-2003, 08:37 AM
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Re: P73 in a 95 civic (StorminMatt)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt »</TD></TR><TR><TD CLASS="quote">
The early (pre-2000, I believe) P73 JDM ECU is basically an OBDI ECU with OBDII plugs. The pinout matches that of OBDII ECUs (without the extra OBDII sensors, of course). So if you have a jumper harness, it should work without problems. I recently wired my 1988 CRX to use a JDM P73 to run my B18C5. And it was no more difficult that wiring a 1992-1995 ECU. Just keep in mind that the JDM P73 uses neither an evaporative purge valve nor a VTEC pressure switch. So there are two less things to worry about.</TD></TR></TABLE>
So with that in mind, can you loose the second O2 sensor?
The early (pre-2000, I believe) P73 JDM ECU is basically an OBDI ECU with OBDII plugs. The pinout matches that of OBDII ECUs (without the extra OBDII sensors, of course). So if you have a jumper harness, it should work without problems. I recently wired my 1988 CRX to use a JDM P73 to run my B18C5. And it was no more difficult that wiring a 1992-1995 ECU. Just keep in mind that the JDM P73 uses neither an evaporative purge valve nor a VTEC pressure switch. So there are two less things to worry about.</TD></TR></TABLE>
So with that in mind, can you loose the second O2 sensor?
07-03-2003, 12:24 PM
#13
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Re: P73 in a 95 civic (b18cx)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18cx »</TD></TR><TR><TD CLASS="quote">
So with that in mind, can you loose the second O2 sensor?</TD></TR></TABLE>
yep. JDM ITR ecu doesn't look for a 2nd 02 sensor. The programming of sensors is on the same level as an OBD1 ecu as far as JDM OBD2 ecu's go, but with the additional disabled VTPS.
So with that in mind, can you loose the second O2 sensor?</TD></TR></TABLE>
yep. JDM ITR ecu doesn't look for a 2nd 02 sensor. The programming of sensors is on the same level as an OBD1 ecu as far as JDM OBD2 ecu's go, but with the additional disabled VTPS.
07-03-2003, 06:47 PM
#14
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Re: P73 in a 95 civic (Katman)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Katman »</TD></TR><TR><TD CLASS="quote">
yep. JDM ITR ecu doesn't look for a 2nd 02 sensor. The programming of sensors is on the same level as an OBD1 ecu as far as JDM OBD2 ecu's go, but with the additional disabled VTPS.</TD></TR></TABLE>
The JDM ITR does not merely have a disabled VTPS (VTEC pressure switch). It is not even there! In fact, there is no mounting point for a VTPS (VTEC pressure switch) on a JDM B18C5! This could create problems if you try to use some other VTEC ECU (ie P28, PR3/PW0, P30, P61, P72, etc). to run a JDM B18C5. You would need to source not only the actual VTPS, but also the plate that mounts to the head and holds the VTEC solenoid itself. This is another good reason to opt for the early JDM P73 rather than some other ECU.
yep. JDM ITR ecu doesn't look for a 2nd 02 sensor. The programming of sensors is on the same level as an OBD1 ecu as far as JDM OBD2 ecu's go, but with the additional disabled VTPS.</TD></TR></TABLE>
The JDM ITR does not merely have a disabled VTPS (VTEC pressure switch). It is not even there! In fact, there is no mounting point for a VTPS (VTEC pressure switch) on a JDM B18C5! This could create problems if you try to use some other VTEC ECU (ie P28, PR3/PW0, P30, P61, P72, etc). to run a JDM B18C5. You would need to source not only the actual VTPS, but also the plate that mounts to the head and holds the VTEC solenoid itself. This is another good reason to opt for the early JDM P73 rather than some other ECU.
07-07-2003, 10:11 AM
#15
Honda-Tech Member
Re: P73 in a 95 civic (StorminMatt)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt »</TD></TR><TR><TD CLASS="quote">
The JDM ITR does not merely have a disabled VTPS (VTEC pressure switch). It is not even there! In fact, there is no mounting point for a VTPS (VTEC pressure switch) on a JDM B18C5! This could create problems if you try to use some other VTEC ECU (ie P28, PR3/PW0, P30, P61, P72, etc). to run a JDM B18C5. You would need to source not only the actual VTPS, but also the plate that mounts to the head and holds the VTEC solenoid itself. This is another good reason to opt for the early JDM P73 rather than some other ECU.</TD></TR></TABLE>
well there's a simple fix for this.
Simply splicing the VTPS into the VTS wire will allow VTEC to work and will not throw a check engine light.
The JDM ITR does not merely have a disabled VTPS (VTEC pressure switch). It is not even there! In fact, there is no mounting point for a VTPS (VTEC pressure switch) on a JDM B18C5! This could create problems if you try to use some other VTEC ECU (ie P28, PR3/PW0, P30, P61, P72, etc). to run a JDM B18C5. You would need to source not only the actual VTPS, but also the plate that mounts to the head and holds the VTEC solenoid itself. This is another good reason to opt for the early JDM P73 rather than some other ECU.</TD></TR></TABLE>
well there's a simple fix for this.
Simply splicing the VTPS into the VTS wire will allow VTEC to work and will not throw a check engine light.
07-07-2003, 02:17 PM
#17
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Re: P73 in a 95 civic (Ivan)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ivan »</TD></TR><TR><TD CLASS="quote">does the jdm p73 allow for a scanner to communicate with it?</TD></TR></TABLE>
I assume it does..
I assume it does..
07-08-2003, 06:00 PM
#19
Honda-Tech Member
Re: P73 in a 95 civic (Ivan)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ivan »</TD></TR><TR><TD CLASS="quote">does the jdm p73 allow for a scanner to communicate with it?</TD></TR></TABLE>
I'm not sure about that one. I would not think it would work with an OBDII scanner.
I'm not sure about that one. I would not think it would work with an OBDII scanner.
07-10-2003, 10:19 PM
#21
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Re: P73 in a 95 civic (turkdog)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turkdog »</TD></TR><TR><TD CLASS="quote">does a jdm p73 have an speed limiter. I heard like 112.</TD></TR></TABLE>
Correct
Correct
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