Hello all. I have been searching about a distributor conversion (OBD2 to OBD1) and I think I am more confused now than before :S Here is my situation. I have a 2001 Integra (OBD2b) and I want to tune the car on neptune (OBD1 P28). I know I have to get the ecu conversion harness but do I need an OBD1 distributor also?

1) Some say ecu and distributor should be OBD1
2) Some say OBD2 distributor doesnt have a crankshaft sensor which is needed by the OBD1 ecu.
3) Some say you need OBD1 distributor if you have cam gears and want to adjust them.
4) Some say all you need is the ecu conversion harness and thats it.

I would really like to shed some light on what exactly is needed and if all I need is the ecu conversion harness, then why do people do OBD1 distributor conversions in the first place? What are the advantages?

Thanks.

 

Conversion harness. That's it. Make shure it's a good one though. Sometimes they're built without all the connections needed. There's a few extra wires that need run in the adapter for the tachometer signal, and to bypass the wiring for the immobilizer.

When someone uses a distributor conversion harness, its usually because they're swapping an OBD1 engine swap with OBD1 distributor into their OBD2 chassis, using their OBD2 engine wiring harness. That's not what you're doing, so don't worry about it. There is no performance advantage to an OBD1 distributor over an OBD2 distributor.

 

Oh ok, I see. So brings me to another question of mine. Is it possible to swap the internals of an OBD1 distributor into an OBD2 distributor which is in an OBD2 car (2001 Integra). What parts are needed to swap over for this to work? Ignitor and coil only or the magnetic sensor as well?

 

Depends on what you're trying to accomplish by swapping the guts over? The internals of both distributors are pretty much identical. The only difference will be the connectors that plug into the engine harness.

 

Because I have a 2001 integra my distributor is gone, but I have an ICM from an OBD1 car (95 B16 delsol). From what I gather, I cant just use this ICM in my 2001 integra but have to swap the OBD1 internals completely right?

 

Nope, just swap the igniter, theres absolutely no difference between an OBD1 and OBD2 D or B-series distributor other than the physical plug(s) where it plugs into the wiring harness. Oh and you can use a D-series igniter as well (coil and CYP/CKP/TDC sensors too) they're all the same.

 

[QUOTE=Jaker;42982962]Conversion harness. That's it. Make shure it's a good one though. Sometimes they're built without all the connections needed. There's a few extra wires that need run in the adapter for the tachometer signal, and to bypass the wiring for the immobilizer.

Could you touch on this a little more? I'm thinking this is the issue why my 2001 Ls trying to run a conversion harness and obd1 won't start. Any additional information/schematics on the additional wiring needed?