hy, guys im new to this forum I need some help on one of my projects I picked from someone else, its a 91 Honda civic ef... they swapped a b18 in it , and wired all the connections with their feet cause that's what it looks like, they also swapped the head off of it and replaced it with a 98 Honda crv head,,,, so its a obd 0 ecu. obd1 engine, with a obd2 dizzy,, I got the car not running, I traced so much crap on this car is not even funny , it wouldn't start and stay running, found ground wire for fuel pump not even connected , blown main realy fuse, and I think they are using the wrong ecu for the b18 , its a pr4 ecu. and I think they are using the wrong dizzy , anyway, I got the thing to run after fixing a bunch of wires, it starts and revs but when driving it has a massive misfire , checked the codes and codes are for crank snsr, tpd location, so basically its the dizzy,.....so I had a spare ecu its a p75 I bought the jumper and installed it , but its worse it wont stay running and im getting a map snsr code, I did swap out the throttle body to a obd1.... but still nothing, im lost on this deal here, question can a obd2 dizzy work on a obd 0 ecu ???? is that my problem ???
thanks

 

OBD electronics are OBD specific. OBD0 will only work with OBD0. OBD1/2 will work with OBD1/2.

You need a OBD1 ECU and OBD1 distributor to run that motor. I have no idea what the 98 CRV head is, but that motor will probably need at least a chipped base map to run.

You bought the fixer upper for sure. Big mistake if you paid more than a handful of dirt for it. To answer the question at the end.

1) No.
2) Yes.

 

yea I know , a lot of mismatches ,,, I tried installing a obd1 dizzy, but the mounting holes don't match with the head, the head came out of a 97 or 96 Honda element or crv..... so I wasn't able to swap to a obd1 dizzy , but sounds like im going to modify the obd1 dizzy to make it work ......
thanks for the input

 

I have another question , I have the p75 ecu , when I plug it in (same car)
for the obd1,, I used the harness, I get a code for the map snsr,but the map snsr im using its for a obd1, wiring is good for the obd1, but still is not reading the map ,, does this mean that the map tables need to be modified on the p75 and also how can I do that ?? new this stuff thanks

 

ok update ,,, I swapped out the obd2 dizzy with another one, I got from the junkyard, and now it runs awesome, but I still have the ses light for the crank snsr and top cyl snsr, also I don't know if its opart of the ecu modifications previus owner did, but 1st gear revs up to 3k 2nd gear up to 3k and 3rd.4rth,5th gear is normal rpm range, is that a 2 step ,, ?? or the ecu trying to protect the engine from damage ??

 

your cel has the car in limp mode, gonna have to clear it before it will rev normally.

 

ok, update , i cleared the light and ses light came on again for code 4 crank snsr.....i double checked the wiring and its all correct , i swapped with another obd2 dizzy and same code, i checked thw white and orange wire to ecu, they are good, .2 ohms,,,, i also replaced with obd1 dizzy and still ses light code 4 and ecu was cleared each time..... according to specs. the crank snsr ohms is 350 ohm, i checked both obd2 dizzy snsrs they are @ 340 ohms i checked the obd 1 and thats @ 330 ohms... so my question, is 340 ohm normal ??? or it has to be @ 350 ohms in order for crank snsr to work, its just weird all my dizzys are out of range ....