B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
10-16-2010, 08:44 PM
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B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
Ok people to start of this is my first post... im a newbe but not new to hondas... ok so i have a little proble... i currently own a 98 honda civic dx, witch had the d16y7 motor... but swapped in a 99 civic si b16a2 motor with tranny.... now the thing is that i got everything plugged in but my speedo doesnt seem to work... do i need a 99 civic si vss? im currently using the stock y7 tranny sensor.. also my tach doesnt work.. hmm everything is pluged in... i swaped a 99 civic si engine harness from the ecu to the engine bay, using a p2t ecu... now i see that my distributor has # amount of wires but the engine harness plug is missing one... cant seem to find any hanging or depinned.. i have a few more problems but these are the ones that i would like to take care of first... THANKS IN ADVANCE
Blinky..!!!
Blinky..!!!
10-17-2010, 08:13 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
Creating the best thread title helps you get more responses by letting members know what specific information is needed:
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10-17-2010, 08:21 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
You can't run the Si engine harness unless you also run a '99 - '00 (except HX coupe) underdash and cabin harness as well or you will not have a speedometer and tach. Get a '96 - '98 5 speed civic harness and modify it.
10-17-2010, 09:28 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
ok well would a 98 ex harness work? in what way would i have to modify it? the car runs great just cant seem to know whjat speed im at... also got a aftermarket tach so my tach isnt really a big problem. just thopught it would look better.... just worried about my speedo, cant seem to know what speed im at.... also will the p2t ecu pnp?
10-17-2010, 10:21 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
You can use the si harness but you will need to get an obd2a to obd2b adapter harness.
10-17-2010, 01:10 PM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
ok well would a 98 ex harness work? in what way would i have to modify it? the car runs great just cant seem to know whjat speed im at... also got a aftermarket tach so my tach isnt really a big problem. just thopught it would look better.... just worried about my speedo, cant seem to know what speed im at.... also will the p2t ecu pnp?
You can get them from rywire, ebay and other places online.
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10-17-2010, 08:22 PM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
ok so let me get this straight.. i have a 97 5speed ex harness... will i need the ex ecu? so i should get rid of the obd2b harness and ecu? if someone could show me a diagram of how to wire the secondary o2 sensor that would be nice.. see i was running this swap with the y7 harness witch ran like crap with the y7 ecu..
10-18-2010, 04:21 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
You could have kept running the Y7 harness, it also needs to be modified though. You'll have to either the run the P2T ECU with an adapter harness, find a '96 - '97 Del Sol Vtec P30 ECU (rare as hell), run a JDM OBD2 P30 (wont pass emissions in several states) or use an OBD2 to OBD1 conversion harness and a chipped OBD1 ECU (also wont pass emissions in several states)
10-18-2010, 07:53 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
im not worried about emissions... ok also i removed my old y7 harness cause it was hacked like crazy... also thanks man.. uve been a good help... say i use a 98 ex harness.. what ecu could i use... also will it pnp? i have a 07 ex harness with ex ecu... also got a also my friend has a p30 ecu... if i get the p30, what harness will i need?
10-18-2010, 03:12 PM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
im not worried about emissions... ok also i removed my old y7 harness cause it was hacked like crazy... also thanks man.. uve been a good help... say i use a 98 ex harness.. what ecu could i use... also will it pnp? i have a 07 ex harness with ex ecu... also got a also my friend has a p30 ecu... if i get the p30, what harness will i need?
10-19-2010, 10:02 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
well would the ex harness with ex ecu work? if so then thats the route i will go since i got everything..... also is there a diagram on how to cut and splice the wires i have to hack in to....
10-19-2010, 04:22 PM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
If I were you I would run a chipped obd1 ecu they are easier to find than the p30 and chippable so you can tune.
10-19-2010, 05:28 PM
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10-19-2010, 08:33 PM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
ok is there a list of ecu's i could use? got a obd2 to obd1 jumper harness but want to make sure what ecu to use... is there any other obd1 ecu's i could use?
10-20-2010, 10:43 AM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
but it would have to be vtec right? also go a apexi vtec controller... OK i have one more question... on my 2000 civic si, (my other car) when im cruising or on the freeway it runs like a charm... but as soon as it hits vtec.. it looses power... i mean its loud as hell and no power after that... but see if i disconnect the plug for the solenoid, it runs faster.. its like if vtec hits... the rpms still climb but slower... and if i unplug it.. i can feel pull throughout all the rpm range.... ive checked oil, replaced oil and filter, clean vtec screen, and alot more.. im lost on this... its been on for like the last 3 months..
10-20-2010, 03:05 PM
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Re: B16A2 SWAP IN 98 DX - speedometer, tachometer, and distributor problems
https://honda-tech.com/forums/honda-prelude-4/official-%22why-vtec-doesnt-engage%22-thread-830163/
Problems and causes i have run into before:
Problems usualy brake down into 2 categories and sometimes include both: mechanical and electrical. the first thing when wiring in a swap or diagnosing a problem is to check and recheck and check 50 trrilion times your wiring, and run new wires if you have to, its very important that electrical is right first. mechanical problems can sometimes be the hardest to diagnois, but there are ways of testing certian issues
*CELs and LIMP MODE, any number of things can throw you into limp mode and you definatly won't have vtec. most likely if you have a CEL fix that first then worry about VTEC. CEL can be a great indicator as to whats going on, and that light is lit for a reason. even when people say, "i have a CEL but thats a different issue" fix that FIRST, then worry about vtec. many codes that are set have alot to do with why vtec isn't working. and if your car is most definatly not acting right take apart the dash and check that your CEL light is not burnt out. it should light up when you first turn the key on.
*VSS/ SPEEDO if your car loses its speed reference vtec will not engauge. the ecu will see it just as if you were sitting still reving the engine, no vtec
*TACHOMETER i have seen a case where there was a problem with a persons tach, and i don't know where the wiring problem was, but if the ecu doesn't have a tach reference , then how is it going to know when you reach proper rpm.. exactly
*OIL, if you don't have the correct oil presure no vtec: possible causes: dented or damaged oil pan (as members have said before) , not enough oil, or oil is so old and crappy it is thin as water
*VTEC OIL PRESURE switch, The vtec oil presure switch is what feeds back information the the computer to tell it wether or not the opening of the solinoid has alowed high presure oil into the vtec oil gallerys. Once the solinoid opens oil shoud presurize the vtec oil ways pushing the locker pins into place while the oil presure sensor right next to the vtec solinoid feeds back info to the ecu.
*TEMP, the cars coolant temp needs to be at a certian temp for vtec to engage, if any of your temperature sensors are screwed up that is another possibility to look into
*VTEC SOLINOID GASKET/screen, i have heard and seen many cases where a cloged or dirty screen that is part of the vtec soliniod gasket caused vtec to not engage or be intermitant.
*THROTTLE POSITION, if your throwing a code for the TPS being bad or wacky this can also cause intermitant or no engagement, from my expermiments, whether vtec engauges or not is throttle position dependent.
Problems usualy brake down into 2 categories and sometimes include both: mechanical and electrical. the first thing when wiring in a swap or diagnosing a problem is to check and recheck and check 50 trrilion times your wiring, and run new wires if you have to, its very important that electrical is right first. mechanical problems can sometimes be the hardest to diagnois, but there are ways of testing certian issues
*CELs and LIMP MODE, any number of things can throw you into limp mode and you definatly won't have vtec. most likely if you have a CEL fix that first then worry about VTEC. CEL can be a great indicator as to whats going on, and that light is lit for a reason. even when people say, "i have a CEL but thats a different issue" fix that FIRST, then worry about vtec. many codes that are set have alot to do with why vtec isn't working. and if your car is most definatly not acting right take apart the dash and check that your CEL light is not burnt out. it should light up when you first turn the key on.
*VSS/ SPEEDO if your car loses its speed reference vtec will not engauge. the ecu will see it just as if you were sitting still reving the engine, no vtec
*TACHOMETER i have seen a case where there was a problem with a persons tach, and i don't know where the wiring problem was, but if the ecu doesn't have a tach reference , then how is it going to know when you reach proper rpm.. exactly
*OIL, if you don't have the correct oil presure no vtec: possible causes: dented or damaged oil pan (as members have said before) , not enough oil, or oil is so old and crappy it is thin as water
*VTEC OIL PRESURE switch, The vtec oil presure switch is what feeds back information the the computer to tell it wether or not the opening of the solinoid has alowed high presure oil into the vtec oil gallerys. Once the solinoid opens oil shoud presurize the vtec oil ways pushing the locker pins into place while the oil presure sensor right next to the vtec solinoid feeds back info to the ecu.
*TEMP, the cars coolant temp needs to be at a certian temp for vtec to engage, if any of your temperature sensors are screwed up that is another possibility to look into
*VTEC SOLINOID GASKET/screen, i have heard and seen many cases where a cloged or dirty screen that is part of the vtec soliniod gasket caused vtec to not engage or be intermitant.
*THROTTLE POSITION, if your throwing a code for the TPS being bad or wacky this can also cause intermitant or no engagement, from my expermiments, whether vtec engauges or not is throttle position dependent.