heres the deal.

my brother has a 91 CRX DX... the car was a complete wiring wreck when he got it. we think we have straightened it out. but one flaw.. it wont start

he put an OBD2 GSR motor in it.. but is running OBD1

he has the conversion harness and it is wired up properly.

he is using OBD0 injectors with a resistor box.

the car will run on starter fluid alone. there is fuel at the rail... but im not sure if the injectors are pulsing.

also the main relay is buzzing when the key is turned on. we have tried a good relay from a running car and same result... buzzes away.

im thinking its in the resistor box or the wiring going to the box.

im posting this to see of your opinions... most likely we will track it down in the next few mins...

 

The main relay buzzes? When my main relay went out I just got nothing - no power at all.

Can you hear the fuel pump come on?

 

pump comes on.

i was thinking it was the yellow/black wires that went to the resistor box... but they are connected properly.

in the large round plug next to the resistor box.. there is a yellow wire with 2 black stripes. it was dissconnected when we got the car. we reconnected it and still no difference. i think it has continuity with the yello/black wires that go to the resistor box... im not sure.. the meter was acting funny. it would beep for a second and not again. but on straight metal it would be constant noise. could the resistor box be bad?

 

Test your fuel injectors at the clip when the car is being turned over to ensure you do have the correct voltage going to them. The resistor box might be bad, however, I have never seen them go bad but still check the amount you are getting.

 

ane CEL? my lsv crx did this awhile back, turns out the chip in my chipped p28 had gone bad. try another ecu. i had the same symptoms that you are describing.

 

you should start over and give us what is in the car, gsr motor and obd1 conversion, obd 0 injector, what ecu and dizzy are you using will also help. is your dizzy an obd1 that my? an obd1 and a obd0 dizzy has different signals, and will not work with the ecu,

 

he has im pretty sure an OBD1 dizzy and we have 2 ECUs... one is a P06... the other i think is a P72.

both have a zif socket installed... though... were not sure if the chips are any good.

ive started cars before with no chip... yea they were in limp mode... but they still started.

there is a CEL but its unrelated to anything fuel.

one for the Vtec solenoid.. and another for something else... i dont remember.

were going to swap injectors for OBD1 injectors today and eliminate the resistor box all together.

 

i am the owner of the car.

so we go out today, and not the main relay is not even kicking on and the check engine light stays solid, and i cant get the trouble codes from the ecu when i ground the service connector. dont know what happened between yesterday and today, but now we cant even get the fuel pump to prime.
we had it running off of starter fluid yesterday.
to clarify specs...
91 crx DX, was converted to MPFi by previous owner (maybe OBD1 also?)
checked all wiring months ago

OBD1 DOHC vtec dissy
chipped p72 and p06, but have been trying to start with both the jumper in the ecus on and off (stock ecu vs chip)
ebay obd0-obd1(yes i know shitty)
OBD0 injectors with a resistor box

 

Standard checks first -
Compression, fuel, spark.
Sounds like you are missing fuel since you had it running on starter fluid.

Seems like people responding to this post are looking over that completely.
IT RAN ON STARTER FLUID

Dephtone
Check wiring from each injector to ECU and resistor box.

 

i need a pinout of an obd1 p72 ECU... this way i can check that the conversion harness is right and everything is pinned properly.

 

http://www.ff-squad.com/technet/wiring.obd1.htm

 

im having same problem. fuel to the rail but not pulse. im converted to obd1 also. but mine ran for 2 days then stopped. good luck man i still cant find my problem

 

exactly how it was yesterday, but mine has not ran yet( except on the starter fluid)

i am starting to think both the ecus got fried somehow, solid CEL, no main relay clicking, nothing. anyway to test the ecu?

 

usually a solid cel indicates bad ecu. u check the ecu fuse to see if u blew it? try your grounds also. i just got done going through my whole engine harness to see if anything was bad and put new obd1 dizzy connectors on. checked out fine. seems to me this is a more common prob than i thought lol id like to see whats up with this prob

 

all fuses and grounds good. like i said it ran off starter fluid yesterday, and today, i cant even get the fuel pump to prime and now a solid CEL, and i didnt even touch the car.

 

yea we left it yesterday cause he had to go to work... closed the hood and dissconected the battery.... go out there today and we are a step back than we left it...

 

Solid cell on the dash, right?
Can you put a jumper in the test connector and pull codes?

 

i am having the same problem in my 91 si i converted it to obd1 and it was running for a couple years and now it has a solid cell and cranks but will not start...i have changed my dizzy sereral ecu's main relay eld and still nothing, let us know what happens

 

we tried to ground the wire.... to no avail.

tell us where to check? and we will check... like be specific. where is said test connector?

 

just type in obd1 pinout honda on google images and it will pop up. so the distributor has the gray plugs. well with all those attemps dose your car still crank over your battery could of died and wont have enought voltage to turn your pump on.

 

On 88 and 89 may have it under the hood by the driver side shock tower.

90 and 91 for sure have this connector under the glove box close to the ECU. A little 2 port connector (I think it's dark blue if I remember correctly) that goes nowhere.
It's the same connector you short out to disable electronic ignition advance so you can set your ignition timing properly.
Put a paperclip in both holes of the connector to short them together (one wire goes to ECU and the other goes to ground).

If you can't find the service connector or if it's not making the CEL on your cluster blink out the codes then short pin D4 (SCS) on the OBD1 ECU to ground.

 

solid cel? check fuses under the hood??

 

jump this and it will flash the code?

 

Yeah. Jump that and turn the ignition to 'ON'.

 

its raining now.. lol

before this though.. we tried to ground a yellow wire.... apparently he did this before and it flashed codes..thats how we got the Vtec code.... but not now.

also the 2 codes we got prior were the Vtec solenoid... and also the O2 sensor... as we dont have that plugged in yet...we dont have the proper sensor.