obd-0 dpfi => obd-1 mpfi
 

Hi. I just found out i have to change the engine in a friends car this weekend. I have read alot about this, but right now i am realy confused.

now. the car is a 93 EDM civic EG 1.5 lsi obd-0 (yes they are obd-0) with a d15b2 dpfi engine (everything is stock). The engine that we are putting in to the car is a obd-1 d15b7 mpfi with engine harness and tranmission. The owner also has a obd-0 to obd-1 ecu conversion harness.

but, can i just use the origninal d15b7 obd-1 engine harness and plugg it into the obd-0 car harness, and only work on the obd-0 car harness. Or will i have to use the d15b2 obd-0 harness and do a dpfi to mpfi conversion,with parts from the obd-1 engine harness?

Re: obd-0 dpfi => obd-1 mpfi
 

A little confusing what your asking but yes you can swap harness's. It's up to you how you want to do it, it would probably take a half hour just to wire in the extra injectors and dizzy but if you'd rather swap harness's then go for it.

Re: obd-0 dpfi => obd-1 mpfi
 

Sounds to me that one harness is obd0 and the other one is obd-1 so he cant just swap the harness. Keep the harness thats for the car then modify that to mpfi then to obd-1.

Re: obd-0 dpfi => obd-1 mpfi
 

:y

Re: obd-0 dpfi => obd-1 mpfi
 

yes, you are right..

so, I will have to use the obd-0 engine harness, and first do the dpfi to mpfi conversion, and then do the obd-0 to obd-1 conversion.

gues ill have to go and read more about the dpfi to mpfi, and obd-0 to obd-1 conversion then.. Thank you guys..

Re: obd-0 dpfi => obd-1 mpfi
 

all are eg's are obd1 so I think you might be on your own a bit. Were some of your 93's obd0 and some obd1?

Re: obd-0 dpfi => obd-1 mpfi
 

That's some weird ----. :S Kinda like the 1992 Crx. :o
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Re: obd-0 dpfi => obd-1 mpfi
 

the EDM 92-95 civic lsi\dxi sedan and HB are obd-0. This is problably becouse they use the old d15b2 engine from the old EF. but they dont use the same wiering colour that older obd-0 cars do. :( The edm civic coupe lsi, is just the same as the usdm coupe with d15b7. And that is the engine that we are butting in to the 93 civic lsi hb.

so we are increasing the power from 90hp to 101hp :D yeeahh..lol

obd-1:
we have a 92-95 civic ESI (cupe\hb\sedan) that have the d16z6 engine. and then we have the 92-95 vti sedan and hb (not coupe) that have the b16a2 engine. And then we also have the sucky civic VEi sedan and hb (not coupe) that have the d15z1 engine..

Re: obd-0 dpfi => obd-1 mpfi
 

i think this guys in not in the states and the cars in some euro spec stuff

Re: obd-0 dpfi => obd-1 mpfi
 

I'm lost, haha. Thats some wierd sheeet. ;)

Re: obd-0 dpfi => obd-1 mpfi
 

Damn, I can't get this car to start..
i have swapped the engine, and done the dpfi to mpfi conversion and the obd-0 to obd-1 conversion. I have checked every wire and it's all fine..
But I get a solid CEL (when i turn the igintion on, the CEL stays on. I have not connected the jumper wire). I have tried three diffrent obd1 ecu's, but that did not help, but if I remove the obd0 to obd1 conversion harness and but in the old obd0 ecu the CEL goes away..

But I have one question..
Is it normal that the fuel injectors have constant earth and gets 12v+ from the ecu? I thought it was the other way around..?

Re: obd-0 dpfi => obd-1 mpfi
 

Somebody posted a Euro MPFI swap link on here just recently do some digging around through this section.

Re: obd-0 dpfi => obd-1 mpfi
 

I know, and i have read it, but it did not help me alot..

But i think the reason i get the solid CEL is becouse normal obd0 cars have the CEL on the ecu, but these EDM 92-95 obd0 cars have it in the instrument, just like obd1. And that is why the conversion harness fucks it up..

But i still think it is wierd that the injectors have contstant ground, and gets 12v+ from the ecu. All the work shop manuals I have read say it's the other way around, both on obd0 and obd1. But I can't find any chematics of obd0 DPFI enigines, just obd0 MPFI..

So if anyone have wiering schematics for obd0 DPFI, please let me know..

Re: obd-0 dpfi => obd-1 mpfi
 

I thought that there is ground there and current is applied to open the injector?So what happens when you jump the connector?

Re: obd-0 dpfi => obd-1 mpfi
 

yeah they have a constnat 12 volt and the ecu grounds them to fire

Re: obd-0 dpfi => obd-1 mpfi
 

nothing happens

Re: obd-0 dpfi => obd-1 mpfi
 

thank you.. that's what i tought..

Re: obd-0 dpfi => obd-1 mpfi
 

Do you have a conversion harness for a North American car?How different are Euro harnesses?Do you have a OBD0 mpfi ecu to try?

Re: obd-0 dpfi => obd-1 mpfi
 

yes, the obd0 -> obd1 conversion harness is for usdm cars..
i think the only differense is that edm 92-95 obd0 cars don't have the CEL on the ecu, you jump a connector and the engine light flashes, just like on obd1 cars..
yes I have a PM7 ECU, but I have not tried it on this car, and I don't se any reson to do that..