tiresmoke

This is a link to an article on D15B's for all who are interested.
http://asia.vtec.net/article/d15b/

These are 1.5L SOHC Vtec 125hp engines and use a P08 ECU, which has to be a Vtec ECU. But not according to some info, here is an eg.
http://www.hondaswap.com/forum...29826
These JDM P08 ECU’s seem to be a mystery to everyone I can’t find the exact pin outs for this ECU. According to that link this ECU isn’t even for a Vtec engine??? WTF is with that.

Now this engine bolts directly into 5 gen civic. The wiring will have to be swapped because of the Rh/Lh drive differences. If you are replacing a non-vtec engine you will need a JDM P08 or USDM P28 ECU and there may be others that will work??? Also you need to run 2 wires to the ECU and one ground wire.
Using the harness that came with the D15B locate the 2 connectors for the Vtec Solenoid (one wire GRN-WHT) and the Vtec Pressure Switch ( 2 wire BLU-BLK and BLK) Either cut the plugs off the harness or untangle the harness and remove the wires intact this method is best as the wires are long enough to reach the ECU. Then solder and heat shrink an ECU pin connector ( that you have unpinned from an ECU plug, using a bobby pin works well) on the end of the GRN-WHT and BLU-BLK wires.

The GRN-WHT for the VTS (Vtec solenoid) goes to pin out A4
The BLU-BLK for the VTM (Vtec pressure switch) goes to pin out D6
The BLK gets grounded

If you use the P08 ECU you do not need to worry about the Purge Control Solenoid as far as I know. As for the other ECU’s I’m unsure what to do with the Purge control Solenoid, I don’t know if the ECU will look for it.

If the car was already Vtec then it is just a matter of plugging in the original harness to the new engine. And the ECU that is in the car should work fine.

Try to get the ECU to match the Tranny
An Auto ECU on a Manual car will give a code 19 Auto trany lock up control solenoid valve,
And a Manual ECU with an auto car = trouble.

The rest of the swap is very simple it just bolts up
It is a good swap for High miles cars and cars that smoke like they are on fire because it is very cheep my total cost was $480 Canadian and it took about 5 hours

allmotrjdm

good info

tiresmoke

please add comments and useful info from personal experience. So this is not such a mystery for the next person. Thanks

Slammd Sol

Great info. I am going to be doing this swap in another 2 weeks. Ill keep this post updated with pics and other info that i can add.

HumanResource

I won't rely on that ECu info
they don't include a lot of ECU's like the OBD--1 DOHC ZC or
P70, P71 SOHC VTEC ZC (D16Z6)

pissedoffsol

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
http://www.hondaswap.com/forum...29826
These JDM P08 ECU’s seem to be a mystery to everyone I can’t find the exact pin outs for this ECU. According to that link this ECU isn’t even for a Vtec engine??? WTF is with that.</TD></TR></TABLE>

it's called a drunk *** editor that i fired. lol

good point out... i'll get on it for edits. theres just so much info to keep track of, and i'm only 1 guy trying to run the thing. i aprpeciate any info you all can give to help inprove the info in anyway.

sbacchus

i did this swap too, you can either plug the purge solenoid into the new engine and just tie it up somewhere, or you can swap the manifold, it will fit on the D15B.

BlueCrxNC

I recently swapped a D15B into my Crx. The P08 Ecu doesn't look for a purge cut-off solenoid... that's why I'm looking for a p28 to use. I simply kept the solenoid from my old motor and left it hooked/wired up and ran the vacuum hose into a tee with the Fuel Pressurer Regulator. That way when I do get a P28 it'll be plug'n'play.

I made my own OBD0-&gt;OBD1 jumper harness and the pinouts worked out to be the same for the P08 as the other OBD1's. No codes etc.

slywfbpsi

The d15b vtec actually makes 128 hp. and it bolts into any 88-00 civic, not just the fifth gen. Without the purge solenoid valve, what symptoms would you have if you use the p08 ecu?

dremmel

uhhhh 88-00, that includes the 5th gen 92-95 hellO

slywfbpsi

yeah it includes it, but it doesn't exempt everyone else either

BlueCrxNC

I don't think that there's any risk in not using the purge cut-off sol... gas mileage just sucked... I got 25mpg city (35 interstate) but when I got my P28 I got 30ish city (41 interstate)

slywfbpsi

Is that's why my gas mileage is bad? I only get like250 a tank before it gets close to the red line.

BRownNH

does anyone have any times with this engine in a hatchback? Thanks.

slywfbpsi

I will as soon as I go to Rockingham.

dremmel

im suprised your not throwing a code. Im using the jdm IM and there was no nipple or vacuum source for the purge vap solenoid. so i did like the other guy and T'd off the fuel pressure regulator.Im not sure if this the greatest thing as far as vacuum pressure goes. I believe VP affects your miles per gallon. I may just have to restrict my air flowing in by going to a cheap DX intake manifold w/EX throttle body port matched. I'll do this because the US DX im has a vac source for the purge thingy. Also, from my swap experience D15B into VX using an EX harness and P28 ecu, I had to rig a throttle cable bracket. the VX throttle cable bracket doesn't mount on both bolt holes for the JDM IM. Probly best if i just get a Ex/Si throttle cable to mount how its supposed to. The other thing i had trouble with is that since im stuck with my VX exhaust manifold for now... I had to add 6-8" of extra wire to my o2 plug(4wire which goes with EX harness & P28 ecu).
Overall i LUV my swap I think the clutch shop got a lil happy lightening my flywheel -3 pounds... & my 6puck ceramic disc . It accelerates like it wants to spool for turbo! I went up to a DX tranny since i really hated the tall gears in the VX (relisting on egay). With a aluminum intake and GREENmonsterfoam HKS filter... dang it howls and hollers! oh, use the VX timing belt & H20 pump for replacing the unknown miles jdm ones.

slywfbpsi

If you use the p08 ecu for the jdm d15b vtec, it does not look for a purge valve, so it does not throw a code.

dremmel

that wouldve been great but i sold the P08 ... hmmm well i didnt wana add more wires for converting the jdm 1wire to a 5wire for my vx, so i used that p08 sale $ to buy a IM w/purge and wire harness with a 4wire o2--- like on the EX/DX. I like it alot tho, adding a JDM siR cluster right now had to use my USDM speedo, and the mph gauge. ill post that later

dremmel

cough bump for the dude up top

ABK

You can use a p06 ecu but I think it has to be chipped. I didn't do the swap but my friend got in his car I could take a close look at the wiring.

no_one_

Could a Z6 manifold be swapped onto the d15b to get around the missing purge control issue? If so, would this help or hurt the power?

Simon Tibbett

So what do I need? I have the motor, I am looking to buy a MPFI conversion kit, I need it of course, what ECU? P28 or P08? I am also looking for a OBD0-OBD1 conversion, is that all I need? My car is a 89 Civic Std. model (dpfi). Any help is appreciated

drewbie*

rexizbest

I've got a z6 dizzy, p28 ecu, and a harness off of a 92-95 ex vtec hatch. Am i good to go? Is this going to be obd1 or 0. This is my first swap so im new at this
Thanks in advance for the replies.

cxjon

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by seearextasy &raquo;</TD></TR><TR><TD CLASS="quote">I've got a z6 dizzy, p28 ecu, and a harness off of a 92-95 ex vtec hatch. Am i good to go? Is this going to be obd1 or 0. This is my first swap so im new at this
Thanks in advance for the replies.</TD></TR></TABLE>

i what car are you puttin this in?