92 GSR b17 into 96 DX EK hatch, fuel problem, help please.

[shandonwall]

Using a b17 and a p72 ecu into a 96 DXhatch. I have the obd2a-obd1 rywire harness and i found out my fuel pump wont kick on unless i place a jumper wire in the main relay. Ok, so, now I crank it over, sounds like it wants to start (with jumper wire turning fuel pump on), then it dies. Found out I am flooding the engine (using d16 obd2a injectors), and so i pull out jumper wire to cut power to fuel pump. Keep cranking. When the a/f ratio gets better, the car sounds like it wants to start, then dies cause there is no fuel. So i keep cycling the fuel pump on and off as i crank the engine. It catches for about 4 or 5 "sparks?" and then quits. I believe that the engine is getting too much fuel. Now here's the thing. I am using a prelude bb4 (92-96) fuel pressure regulator AND I have yet to perform the IACV mod (three wire to two) AND I have not hookied up IAT yet. Vtec is wired, knock is wired, tps wires lengthened, and I checked all the ECU pinouts through the obd2a wire harness and matched them up through my rywire adapter harness and the GSR ECU pinouts. Everything matches, all the voltages and resistances check out. I cannot get this thing to stay running. Motor is timed perfectly, spark plugs are new, wires are new, cap and rotor new, firing order is correct. I guess all I am asking is: Does the IAT sensor and/or IACV need to be connected? I'll hook these up and see what happens, but i am not sure if they need to be hooked up yet. Oh, also, my O2 sensor is plugged in but not in the exhaust bung (just laying out in the open). Any help is appreciated. Thanks

 

[crvtt96]

You really need to have everything hooked up, specially the 02 in the pipe, when it does start the 02 is going to help it stay running. It seems like your main relay might be bad too. Have you or can you check what key on fuel pressure is?

 

[shandonwall]

Got it running

Well, I got a call from a mechanic buddy, and he told me to hook up the IACV (had to convert from 3-wire to 2-wire). also plugged in the IAT sensor. I left the O2 sensor hanging and went to crank the engine. It fired up and ran after a couple of minutes of playing with my fuel pump (jumper wire trick at main relay). I have yet to build an exhaust for it (has just manifold) and I am waiting on my radiator hoses before I let it run longer than a minute. It still wants to cut out towards the 30 second mark, its weird. I'll crank the engine over with the fuel off, and let it dry out (lean out), then put power to the fuel pump, it'll catch, then rev up, then stay running for a while, then bog out at about 25-30 seconds into it. I'll build an exhaust and get my cooling system hooked up, then see if I have anymore problems. Thanks for the input.

 

[crvtt96]

It's like a second job until you get it on the road !