Elpuma's 88 hatch

[elpuma]

Starting to go obd1.
Ordered a few things from HA Motorsports


The chipping kit


ROM with p75 basemap


Picked up a dizzy




Then the rest of the things i needed like p06 ecu and conversion harness from boomslang




Desoldered the areas where i was going to add parts from the kit.


Soldering things in


Finished

[elpuma]

Depinned and switched b11 and b15 around. Then i did switched b12 and b16.


Took my seat out.


Stock ecu


p06 with conversion harness installed


To get the new dizzy to fit in I had to grind a bit off the thermo housing


So stock dizzy


Obd1 dizzy


Here you can see why i ground a bit of the thermo housing.

[hondalude86]

Famn thats awesome. Why did you switch the wiring order?

[ShyBoyCA6]

Nice man

[elpuma]

I switched the wiring order because the the harness i bought is not meant for our accords. If you want a pure simple plug and play harness you just gotta pay an extra $50.
Here's the thread were i got the info from to use a civic obd0 to obd1 harness.
https://www.3geez.com/forum/showthread.php?t=62375

All I need to complete my conversion is the shielded wires.

[obdriver6]

You made the obd1 conversion look so simple! What jumper harness did you use?

[elpuma]

I guess its easy. I used Boomslang MPFI OBD0 to OBD1 conversion harness.
I used this pinout to double check everything on it http://carotman.no-ip.com:8888/perso...0A3pinout.html

then i came up with this


OBD1->OBD0 - Function
A01 ->A01 - #1 injector
A02 ->A07 - #4 injector
A03 ->A03 - #2 injector
A04 ->N/C - VTEC solenoid Valve
A05 ->A05 - #3 injector
A06 ->N/C - O2 Sensor Heater Control
A07 ->A6&A12 - Fuel Pump Relay (FLR1)
^^boomslang A07 ->A12&14
A08 ->N/C - Fuel Pump Relay (FLR2)
A09 ->A11 - EACV
A10 ->N/C - EGR solenoid valve
A11 ->N/C -
A12 ->N/C -
A13 ->B06 - Check Engine Light (MIL)
A14 ->N/C -
A15 ->B01 - A/C Clutch Relay
^^boomslang A15 –>B02
A16 ->N/C -
A17 ->N/C -
A18 ->N/C -
A19 ->N/C -
A20 ->B02 - Purge Control Solenoid Valve
^^boomslang A20 ->A06
A21 -> run a wire to dizzy - Igniter Power Source (IGP1)
^^boomslang A21 ->15&17
A22 ->N/C - Igniter Power Source (IGP2)
A23 ->A02 - Power Ground (PG1)
A24 ->A04 - Power Ground (PG2)
A25 ->A13 - Main Relay IGP1 (IG Power)
A26 ->A18 - Logic Ground (LG1)
A27 ->N/C -
B01 ->A15 - Power Source (IGP2)
B02 ->A16 - Logic Ground (LG2)
B03 ->N/C -
B04 ->N/C - Service Check Connector
B05 ->B08 - A/C Switch (ACS)
B06 ->N/C -
B07 ->N/C -
B08 ->N/C - P/S Pressure Switch
B09 ->B13 - Starter Switch Signal (STS)
B10 ->B18 - Speed Sensor
^^boomslang B10 ->B16
B11 ->C01 - CYL Sensor
^^boomslang B11 ->B08
B12 ->C02 - CYL Sensor
^^boomslang B12 ->B10
B13 ->C03 - TDC Sensor
B14 ->C04 - TDC Sensor
B15 ->run shielded wire to dizzy- Crank Angle Sensor
^^boomslang B15 ->C01
B16 ->run a shielded wire to dizzy- Crank Sensor
^^boomslang B16 ->C02
D01 ->A17 - Back Up Fuse
^^boomslang D01 ->B01
D02 ->N/C - Brake Switch
D03 ->N/C - Knock Sensor
D04 ->N/C- Service Check & Ignition Timing Connector (SCS)
D05 ->N/C -
D06 ->N/C - VTEC Pressure Switch
D07 ->N/C - Data Link Connector
D08 ->N/C -
D09 ->B14 - Alternator
D10 ->B19 -
D11 ->C07 - Throttle Position Sensor (TPS)
D12 ->N/C -
D13 ->C06 - TW Sensor
D14 ->C16 - O2 Sensor
^^boomslang doesn't run this connection but they provide wires to use an obd1 o2 sensor
D15 ->C05 - Intake Air Temperature Sensor
D16 ->N/C -
D17 ->C11 - MAP Sensor
D18 ->N/C -
D19 ->C15 - Sensor Voltage (VCC1)
D20 ->C13 - Sensor Voltage (VCC2)
D21 ->C14 - Sensor Ground (SG1)
D22 ->C12 - Sensor Ground (SG2)

The pinouts in bold are the ones you have to rearrange. Underneath them in bold i show how boomslang ran them which is wrong and needs to be arranged like the top one.

[gfrg88]

I think this info might also be in the obd-1 conversion thread. Good to know another person that had success with it!! Keep up the good work, man!

[89T]

I've posted it aswell.

But hey, figuring things out is half the fun.

[gfrg88]

I've posted it aswell.

But hey, figuring things out is half the fun.

Yupp. I believe it's all in the obd-1 thread, right? Maybe we should get a better DIY for obd-1 conversion that doesn't have all the comments. That would be cool for anyone trying to do it

[elpuma]

I'll try and make a DIY with lots of pics and stuff once i get my conversion all done.

[89T]

Here is my information if you want to double check your's .
https://www.3geez.com/forum/showpost....&postcount=291

[elpuma]

Thank you 89T.

[Tdurr]

Lookn good man, I'll be mixing my set up around soon

Also, smart idea about that tw sensor.

[elpuma]

SHE RUNS!! i'll post a vid later tongith.

[elpuma]

There it is
http://www.youtube.com/watch?v=QLuTx...ature=youtu.be

[89T]

That's awsome, another obd1 swap complete.

[elpuma]

yea only thing that isn't working is my tachometer. Any ideas why?

[elpuma]

So here is the pigtail i used for the dizzy. At the jy i go to they take all the parts of the engine out so i used a different 8 pin connector. Stock dizzy only has 4 wires and obd1 has 7 (8 if using external coil). Pretty much connect the stock wires as so
stock ->obd1 dizzy
orange ->orange
white ->white
orange/blue ->orange/blue
white/blue ->white/blue




On the stock dizzy cut this wire off.


There will be 3 wires in there.


This pigtail i'm using agian was from a different part of the car but just make sure the correct wires en up on the dizzy
obd0 ->obd1 dizzy
black/yellow ->black/yellow
blue ->blue


So with the stock engine harness you should be able to connect these 6 pins onto the obd1 dizzy

[obdriver6]

Congrats on the OBD1 swap!

[elpuma]

For the last 3 wires that aren't connected yet, i ran wires from the ecu to them. The blue/green wire needs to be shielded and goes to B15 on the obd1 ecu. Blue/yellow also shielded goes to B16 on the obd1 ecu. Yellow/green goes to A21 on obd1 ecu.




Here is a pic of my conversion harness after i moved some things around to match the obd0(accord) to obd1 pinouts in post #32.


To minimize the hassle of desoldering and soldering on the conversion harness i moved A6 over to A14. You can leave that red wire unplugged since its not needed.




To use stock o2 sensor i cut C16


Used the white wire provided by boomslangs 8pin sub harness


Connect, solder, shrink tube and you're good to use stock o2 sensor.

[ShyBoyCA6]

Nice Set-up Elpuma...But didn't you call for the OBD1 harness they could make for you for the accord? either way congrats on getting it done! looks great.

[elpuma]

I emailed them but never got back from them. I called but for some reason they were closed for like the whole week. Either way i saved myself some money by just buying this harness. And i was able to find out all the pin outs and make a list for ppl that just wanna make there own harness

[ShyBoyCA6]

I emailed them but never got back from them. I called but for some reason they were closed for like the whole week. Either way i saved myself some money by just buying this harness. And i was able to find out all the pin outs and make a list for ppl that just wanna make there own harness

huh thats weird... but glad it all worked out! have you gone for a drive yet? any difference?

[elpuma]

Yeah i took it for a spin. Idle is more smooth. Accelerates quicker than before.