crxbrad

Hey, how do you wire up the butterfly? And where does that vacuum line go on it?
Thanks again for the props. And Deetz, that thing looks sweet in your car. Good job. Keep an eye on my thread, I'll have plenty of questions to come.

grog

I also have a p28 with hondata which can't run the secondary's. A p28 just doesn't have that feature even with the hondata. So i used an MSD rpm switch to activate it.
As far as the vacuum lines you need the special little vacuum tank (hopefully its mounted under your intake). There should be a little soleniod thing (it looks just like the stock crx purge valve next to the map sensor, it might work for this too) attached to the vacuum tank. this is what needs to be wired to the rpm switch.

You also need a check valve for the vacuum line that feeds the tank.
I suggests looking through some online parts diagrams, they can be very usefull. try acuraautomotiveparts.org. look through the vacuum tank section. If you find it the main parts are10 (tank)11 (tank mount bracket), 9 and 5 (control soleniod) , and 7 (check valve).
I would post links if i could but i'm using a ps3 and it cant

One way to connect it temporarily is to just run a vacuum line straight to the butterflies and they will open any time you give more than 60% throttle which sounds beefy, but the proper setup is to activate at 5800 rpm.

crxbrad

Well, I don't have that vacuum canister under the intake manifold. Can I leave the butterfly on there and just connect the vacuum line to something? Maybe just have a t in one of the lines and connect it there? Or just get rid of it? Also, a sensor question:
The CRX had the MAP sensor and purge sensor on the firewall. The MAP on the GS-R is on the throttle body. And I believe the sensor on the top of the GS-R's intake manifold is the purge sensor. Not sure though. What should I do w/these? Should I get rid of the firewall sensors? I have already wired the MAP sensor to the GS-R on the throttle body. Wondering what to do w/the purge sensor though. Should I leave the purge sensor on the firewall? Or just wire the one on the top of the GS-R's intake manifold. It's these small brain teasers that make me stand and just look at the car instead of actually working on it. Anyway, I'm tryin to get some stuff done this weekend.
Help me out guys. Thanks.

Sammy Po

if i knew i'd let you know... but im not sure..

anyway, looks good man! post up some more pics!
pz

grog

check out this diagram, it should help.
you dont need the firewall mounted sensors but the purge solenoid might be worth saving (it might work for the vacuum tank control solenoid). And yes use the GSR's sensors.


http://www.acuraautomotiveparts.org/...s=&view=normal

Yes you can just run a vacuum line straight to the butterflies, Configured this way they will open when you give more than 60% throttle. Thats what I did while i was gathering all the little parts (vacuum tank, solenoid ect.) to make it like OEM. It is supposed to get activated at 5800 RPM

crxbrad

Sweet diagram. Very helpful man. Thanks.

crxboy111

can anyone please help me with this please one of my pins can out i put it back in but idk if i put it back in the right place.can some show me pics of a 0bd0 to 0bd1 jumper so i can see how the pins look.please i really need my car back started =( the top the bottom

grog

Holy threadjacker batman!

I would like to help you crxboy111 but please start your own topic, and also be more specific about which wire you mixed up (maybe you dont know), and what motor and ECU you have.

Hey crxbrad if you have any more questions about vacuum line or coolant hose routing go to that link i posted and you can browse through the online parts catalog, they have great "exploded" veiws that can be really helpfull, I was constantly looking at these when I did my swap.

crxboy111

ok bro im sorry but its a la motor and the ecu i have is a pr4.i just wanted to know do the pins look right if not can some one let me know k.=(

crxbrad

hahaha Holy threadjacker batman. hahaha
Yeah, I'm not a fan of the threadjacker.
Thanks again for the diagram grog. I will definately be using it to finish up this swap.

crxboy111

i found out were the pin goes the car stared right up lol yeah baby.

crxbrad

K. So, I know I need to get rid of the resistor box because only obd0 injectors need the resistor box.
So, what is the procedure to remove the resistor box and the wires coming from it? The CRX harness runs from the connectors that come through the firewall and goes accross the engine to the resistor box. ????

crxboy111

cut them and just wire them to gathere.

crxbrad

Any other thoughts? More detailed?

grog

Yeah, it really is that simple. just cut all the wires that go to the resistor box, then solder them all together and tape it up.

or alternately you could use Obd0 injectors.

https://honda-tech.com/forums/showth...t=resister+box

crxbrad

K. Thanks guys. I also need to know what all gets grounded in the harness. I moved my fuse box inside the car and unfortunately(retard), didn't take many pics of the wiring and what all went into the fuse box as far as grounds go.
And I need to run wires for the crank positioning sensor. The person that did the Y7 swap didn't even have wires ran for the cps. If anyone knows what pins I need to run wires to, for the P28, let me know. Link if possible.

Thanks

grog

Is it just the underhood ground locations that you need?

heres a good wirite up
D.I.Y. / FAQ - OBD-0 --> OBD-1 Pinouts and Conversion
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/d-i-y-faq-obd-0-obd-1-pinouts-conversion-help-1319235/

danny_pack

i have the same swap in my crx,but i am currently have problems it ran great when i first got it done for a few weeks now it cranks an runs but revs slow an it doesnt turn past 3500 rpms its like theres a rev limiter there sum1 told me i needed a distributor so i bought a brad new 1 an i still have the same problem can some1 plz help me out

crxbrad

I don't know dude. It's cool you have done that swap too. But this is my thread for MY questions. Make your own for your questioins dude!

crxbrad

Got another question. The sensor on the crank.....That is the crank angle sensor correct? Cause there's also a cylinder position sensor. And I found a pin out of the obd0 crx ecu. It says the crank angle sensor is B10 and B12. Sound right?

Also I've asked questions about this already but.....how do I connect these wires from the resistor box together? I'm not much for wiring.


And I've started the wire tuck.


Too much wiring!!




Thanks

samearhiltz

Nice build

slowrexsi

just want to know if you had to make a big dent in the frame for the alternator ? oh and your bay is sick ! i give you mad props !!!!!!!!!!!!!!!!!!

91hatchproject

looks like a headache
mad props for taking it on

213374U

Just finished this swap. Not legal yet but VERY soon hopefully

EF_typeR

Nice! Keep updated.