ls/vtec wiring up vtec. help!
11-02-2004, 06:20 PM
#1
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ls/vtec wiring up vtec. help!
im throwing a 99 gsr head on a 98 ls block in a 98 ls...
i have a p28 and a obd2a-obd1 harness, however how exactly do i wire up the vtec.. im guessing the LS chassis doesnt come prewired for vtec. or does it?
how exactly do i do this guys?? do i need to splice with parts from a vtec harness? im completely stumped im sure its not hard i just simply have no idea..
any responses are appreciated.
and yes i searched
i have a p28 and a obd2a-obd1 harness, however how exactly do i wire up the vtec.. im guessing the LS chassis doesnt come prewired for vtec. or does it?
how exactly do i do this guys?? do i need to splice with parts from a vtec harness? im completely stumped im sure its not hard i just simply have no idea..
any responses are appreciated.
and yes i searched
11-02-2004, 08:44 PM
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Re: ls/vtec wiring up vtec. help! (tegsallgood)
here you go..........https://honda-tech.com/zerothread?id=1043511
11-02-2004, 09:36 PM
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Re: ls/vtec wiring up vtec. help! (redturbocivic)
https://honda-tech.com/zerothread?id=805408
you need to search harder. don't forget archives, too.
you need to search harder. don't forget archives, too.
11-03-2004, 04:37 AM
#4
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Re: ls/vtec wiring up vtec. help! (LSvtec03)
you can wire up vtec thru just the vafc2? hmmm i dont like that for some reason i dont trust that. i think im ging to stick with the p28 and go obd1... however no ones really answered my question unless im retarded and cant understand... does my chasses have to be wired for vtec? or wait... im so confused!! please someone explain in baby terms please!!!!! i need a clear cut answer im so frustrated and dont flame me for saying this i dont have the patience. and yesss im experienced with wiring thats not an issue i just need to know what wire goes exactly where!
11-03-2004, 06:05 AM
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Re: ls/vtec wiring up vtec. help! (tegsallgood)
no it dont have to be wired for vtec. I am using my Ls harness and I just put in vtec wires. For the oil pressure sensor, vtec solenoid, and something else I forgot. Just plug them in the correct spots of your ecu
11-03-2004, 06:13 AM
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Re: ls/vtec wiring up vtec. help! (redturbocivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redturbocivic »</TD></TR><TR><TD CLASS="quote">no it dont have to be wired for vtec. I am using my Ls harness and I just put in vtec wires. For the oil pressure sensor, vtec solenoid, and something else I forgot. Just plug them in the correct spots of your ecu</TD></TR></TABLE>
Knock sensor
Knock sensor
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11-03-2004, 06:46 AM
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I highly recommend that you DO NOT use the VAFC method. With that method you just have your base fuel map. On VTEC ECUs they contain two seperate fuel maps.
11-03-2004, 10:08 AM
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Re: (redturbocivic)
yeah i already have my p28 i wasnt even aware that you could do it solely thru the vafc. seemed shady to me
p28 doesnt have knock?
p28 doesnt have knock?
11-03-2004, 10:31 AM
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Re: (tegsallgood)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegsallgood »</TD></TR><TR><TD CLASS="quote">yeah i already have my p28 i wasnt even aware that you could do it solely thru the vafc. seemed shady to me
p28 doesnt have knock?</TD></TR></TABLE>
NO
p28 doesnt have knock?</TD></TR></TABLE>
NO
11-03-2004, 12:28 PM
#13
Re: ls/vtec wiring up vtec. help! (tegsallgood)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegsallgood »</TD></TR><TR><TD CLASS="quote">you can wire up vtec thru just the vafc2? hmmm i dont like that for some reason i dont trust that. i think im ging to stick with the p28 and go obd1... however no ones really answered my question unless im retarded and cant understand... does my chasses have to be wired for vtec? or wait... im so confused!! please someone explain in baby terms please!!!!! i need a clear cut answer im so frustrated and dont flame me for saying this i dont have the patience. and yesss im experienced with wiring thats not an issue i just need to know what wire goes exactly where!</TD></TR></TABLE>
u can use an ls ecu and have vtec. the vafc will turn it on.
u can use an ls ecu and have vtec. the vafc will turn it on.
11-03-2004, 12:46 PM
#14
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Re: ls/vtec wiring up vtec. help! (LSTEG96)
yeah i know but from what ive read its called "one wire vtec" and supposedly its not as good.. id much rather have the p28 ecu which is made for vtec and has the dual maps.. then use the vafc to choose the cross over points only instead of running it completely. make sense?
11-03-2004, 01:09 PM
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Re: ls/vtec wiring up vtec. help! (redturbocivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redturbocivic »</TD></TR><TR><TD CLASS="quote">forget the whole vafc deal. Just follow that link I posted and it will work. It worked for me</TD></TR></TABLE>
you posted the link to this thread...
https://honda-tech.com/zerothread?id=1043511
that's the thread we are posting in right now.
you posted the link to this thread...
https://honda-tech.com/zerothread?id=1043511
that's the thread we are posting in right now.
11-03-2004, 06:25 PM
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Re: ls/vtec wiring up vtec. help! (redturbocivic)
Yeah id susgest using the clips, the way i am going to wire it is get the cllip for the knock sensor (P30) soleniod and sensor, run a wire from there to the ECU and get the clips that slip into the ECU. The hard part is finding the clips and and connectors. If anyone has any, LMK.
11-03-2004, 07:01 PM
#22
Re: ls/vtec wiring up vtec. help! (tegsallgood)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegsallgood »</TD></TR><TR><TD CLASS="quote">well an LS has one right? so i should have one already</TD></TR></TABLE>
NO. this is why u use a p28 and not a p72. just buy an obd1 p28 and obd2-obd1 harness. ull be fine.
NO. this is why u use a p28 and not a p72. just buy an obd1 p28 and obd2-obd1 harness. ull be fine.
11-03-2004, 07:45 PM
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Re: ls/vtec wiring up vtec. help! (tegsallgood)
LS do not have knock sensors, the ones that do are GSR, TYPE R, B16...correct me if im wrong, but isn't it only the DOHC VTEC motors that have a knock sensor?
11-03-2004, 09:12 PM
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Re: ls/vtec wiring up vtec. help! (GWInquisitor14)
There is no knock sensor wire on a vafc. A p28 ecu has no knock sensor and neither does a b18b. So like stated earlier. Use an obd1 p28, get an obdII-obdI conversion harness have your computer reprogrammed, and run the 3 wires(or 4) that you'll need to not throw any check lights and have your sensors hooked up. Pretty easy stuff. I'm not sure if your chassis harness is set up for vtec or not. But your engine harness is not thats for sure.
