Alright guys iv done a ton of researching in the last week tryin to get my car to run. heres the run down of the car: its an 89 lx that had a d15b2 in it and it was really tired so i bought a d15b8 8v motor to replace it. At 1st i tried running it with the old dpfi setup and would not run right so i decited to convert to mpfi along with obd1 since i had all the parts. ok the issues im having is i cant get it to start. Its not throwing any codes with the p05 obd1 ecu. This is how i did the obd1 injectors- i cliped the injecrtors plugs from the obd1 harness and soldered the 4 yellow/black commen wires from each injector with one different wire to run inside to the ecu.done. i do have them in order 1st injector is the one by the cam gear. each injector had 1 wire left on it (brown, yellow, red, light blue) which i extended each one to the ecu. I had to buy a obd0 to obd1 jumper for the p05. Now whats weird is where i put the 4 (brown, yellow, red and light blue) injectors wires to plug A on the obd0 plug side a1,a3,a5,a7 in the correct order. the jumper harness didnt have any pins coming out of tobd0 plug to the obd1 plug side so i took them off the obd0 plug (a1,a3,a5,a7) since they wernt going anywhere and just connected them straight to the obd1 plug where the obd1 injectors are supposted to be which is (a1,a2,a3,a5). Iv tried moving the 1 wire with the commen blk/ylw 4 wires from the injectors to different sopts one the obd0 and obd1 plug side. still n no fire. It has bumped a few times very little but wont fire up. I NEED HELP lol. any ideas????

 

K... OBD0 is like this
Pin A1 - Inj 1
Pin A3 - Inj 2
Pin A5 - Inj 3
Pin A7 - Inj 4

OBD1 is different.
Pin A1 - Inj 1
Pin A2 - Inj 4
Pin A3 - Inj 2
Pin A5 - Inj 3

The black/yellow is switched power (only gets power when ignition is on).
Not sure where/why you are moving it around, but you need to place it where it needs to be!

 

by moving it around i mean iv tried a15 like it says and a13 on the obd0 plug. then i tried just putting it on obd1 side where the jumper would take it to on the obd1 plug.

 

if u get a jumper harness just wire the injectors to obd0. then u dont have to worry about the differences with the inj pins

 

when u do dpfi to mpfi dont worry about a15...on ur dpfi harness do this...

this will take care of the inj 12v source that is needed

 

i did that at 1st...depined the obd0 and pinned in the correct injectors wires to a1,a3,a5,a7. but the jumper harness that plugs into the obd0 to convert to obd1 has no pins going out of the harness from the obd0 a1,a3,a5,a7 spots. so thats why i moved them over to the obd1 side of the harness to the obd1 injectors pins a1,a2,a3,a5

 

ok, i havnt done that yet. i Have a lx harness if that matters. i still have the 2 dpfi injectors plug on the harness just not being use.

so that pic you drew, im suppost to tske all of the blk/yel wires from the injectores and cut off the dpfi injector plugs and wire the 2 blk/yel from dpfi injectors and solder them to the commen blk/yel on the obd1 injectors?

 

is the correct?

 

yeap dx is the same as lx. and u dont need to run any wires to the ecu for the blk yel 12v. jus on the harness do thisim suppost to tske all of the blk/yel wires from the injectores and cut off the dpfi injector plugs and wire the 2 blk/yel from dpfi injectors and solder them to the commen blk/yel on the obd1 injectors

 

ok thanks! ill try it and let you know in 15mins or so

 

still didnt fire... i cut the dpfi plugs off and put the 2 blk/yel wires together and spliced into the i wire i had soldered to the blk/yel injectors

 

ok i just checked the spark again...and i have aton of spark so its not that either. i put a volt meter to the 12+ sorce from the dpfi injectors and i was getting 8-9v when turning over and 10-11v for a sec when the key was turned on but not turned over... im stumped

i pulled all the plugs out and they smell like gas... and were kinda wet

 

You have a resistor box right?

 

nope cuz im using obd1 injectors, dizzy and ecu

 

ok now check ur dist wiring
dpfi-mpfi
http://media.photobucket.com/image/d...izzyConn-3.jpg
obd0-obd1
http://img91.imageshack.us/img91/934/obdconvertes7.jpg

 

Is this blk/yel getting power when you turn the key? That's all it needs.
For testing you could hook it directly to the + battery for all that it matters.

Recheck your individual inj wires against the list I gave you.
Are they going to the correct spots on the OBD1 side? They are not in sensible numerical order like the OBD0.

If your wiring checks out, then you need to move on.
Pull all your spark plugs and turn the engine a few times and check for fuel in each cylinder.
Check for spark on each plug.
Disconnect the injectors and check compression in each cylinder.

You may want to put a little oil in the cylinders before putting the plugs back in. The rings may not be doing very well since they may have gotten washed out with fuel and no spark.

 

i have lots of spark. i wired it according to this, just swapped over colors and added the 2 new wires

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/diy-dpfi-mpfi-swap-made-easy-2889205/

 

yeah i put the individual wires on the obd1 side of the jumper harness to plugA pin1,pin2,pin3,pin5. correct?

i got the plugs out so ill check to make sure the injectors are spraying and ill try the oil in the cylinders

ok and i dubble checked the power to the injectors and im gettin 11.27v with the key turned on and i have the plugs out and turned it over and its definitly getting gas i can smell it in the cylinders

 

Yes - those are the correct pins on the OBD1 side.
BUT they do not correlate in order to the injectors like the OBD0.

ECU pin 1 goes to cylinder 1
ECU pin 2 goes to cylinder 4
ECU pin 3 goes to cylinder 2
ECU pin 5 goes to cylinder 3

 

yeah i know that. i went over that but ill dubble check that again.

i pulled out my spark plugs and clean them and drizzled a lil oil down the cyliniders and put the plugs back in and tried to fire it up and it bumped like once tring to fire up but never did. so i took the plugs back out and they were all wet with gas like alot....

 

ok so i looked at the obd1 injector order and they are in different order then what you said above so ill switch them around and see if that works. if they are switched backwards like they are now does that explain the gas on the plugs why they were so wet cuz of the injector order is off from the spark order? and again there is no cels on...

 

alright i did have a few of the injectors wires backwards and i fixed it to correct order. still didnt fire up...took a plug out and it covered in gas.....something it making me think spark, timming, etc. theres gas in the cylinders...and i checked #1 cyl plug and it has lots of spark....still no cels at all....

 

You won't get CELs right now unless you have something grossly miswired - like power going to ground.

Wet plugs will occur when combustion doesn't happen for whatever reason.

Check all 4 cylinders for spark and not just one.

Make sure you have distributor wired correctly. Even though #1 is getting spark it's odd to me that your plugs are fouling with fuel. If you have spark at the RIGHT TIME then the fuel will burn.
While you are checking your distributor wiring, pull all your plugs out and let the cylinders air out. It's possible that they are flooded with fuel at this time.

Check timing belt if it won't fire after this. It could be that your cam/crank timing is not right.

 

yeah im sure the cylinders are full of gas now...ill let it air out. and i just checked the dizzy again and its wired correct. i gotta wait till i get a 2nd person to check the spark cuz i cant do that alone.... im getting pretty bumed man iv been workin non stop for 2 weeks now doin this d15b8 swap. most of the time rewiring for mpfi and obd1 and trobble shooting everything and now im stumped lol

 

bump