reygray

Hello

Need a little help. Having a no crank, no start condition on my 89 Honda CRX Hf. In the midst of doing a D15B engine and transmission swap. Which entails quite a bit. I purchased this vehicle not running, basically no motor and no tranny. So we are switching in a D15B non vtec set up. And converting from the Hf's obd0 to obd1 ecu and obd1 engine and tranny (obd1 distributor, ecu, etc).

So far what we have done is replaced engine and tranny (with modified mounts). We kept original Hf obd0 wiring harness and ran jumper harnesses (purchased off ebay and amazon) between 1-the Hf harness and the obd1 distributor 2-the Hf harness and a P06 ecu (obd1). 3-To a 4-wire o2 sensor. We also changed the fuel injector connectors on the Hf harness (Taken from the wiring harness off of the D15B) being sure to treat the yellow w black stripe wire as power. Tested the injectors and we are getting power to the injectors.

Battery is good. Starter is also good. When we jump the starter directly is actuates initially but does not crank engine over. Engine does turn freely by hand. Replaced the main relay and the fuel pump: so when I turn the key in the ignition, the main relay clicks and the fuel pump can be head powering on. But still no crank no start.

There aren't many people or at least I haven't been able to find any info on this particular swap D15B (non vtec) most people do the B-series swaps or if they do a D-series it's a vtec option.

If anyone has any idea or inputs as to why it won't crank or start please let me know. I'm thinking maybe ECU is bad?

Justin Catalano

Cant see them in the pics so i wanna say check your ground for the motor and trans ,and double check the resistor box delete ,make sure all the wires are spliced together . Is the ecu throwing any codes

reygray

thanks for your response justin I'll double check those grounds and double check my resistor box delete. ECU is not throwing codes.

Efmysedan

Resistor box deleted
but are you using obd0 or obd1 injectors

if I’m wrong someone lmk
but with a resistor box delete you need obd1 injectors

Efmysedan

And open your ecu see if it smells burnt. Maybe running obd0 injectors with no resistor box burnt it out

~sp33~

From the pics, it looks like you have a few problems to solve still. For example:
- Your injector resistor box (which you don't need for OBD1) has been cut off, but instead of being rewired, your injectors are not grounded.
- The cooling fan switch which is located on your thermostat housing for OBD1 is unplugged. Are you using the OBD0 sensor in the back of the block? If not, your fans will not activate.
- I can't place that random grey plug that's been spliced on.

Firstly though, when you say 'engine doesn't crank', can you confirm that the starter is not turning the motor over?

If that's the case, there's a power or ground distribution problem. Your starter needs 12v power, The engine needs to be grounded, and the signal wire needs to be hot when you turn the key to START. The signal wire runs through your ignition switch. Do you have a workshop manual for the car? If not, PM me your email address i can send it through and you can do some diagnosis yourself.

reygray

hello
thanks for your response. They are indeed OBD1 injectors (it's an OBD1 engine). I'll double check the ECU anyway and see if it's burnt inside at all.

reygray

hello, thanks for your response.
yeah I have some non-essential-to-turn-the-engine-over components unplugged like the switches you are referring to.
My concern is just with starting the car at the moment. I can confirm that the starter is not turning the motor over. I'll go through those steps but would greatly appreciate the workshop manual. I will PM you thanks