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h22a swap in 96 prelude

Old 08-26-2013, 01:02 PM
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Default h22a swap in 96 prelude

I bought a 96 prelude as a project car. it has a jdm h22a and hasn't been running since the swap was put in. the problem is not getting fuel. the pump works and it is getting fuel to the rail. I do not see a resistor box and the ecu is a p13. My question is with the stock jdm inectors OBD1 do you need to have a resistor box or should they work without one. I am getting spark all grounds are connected (yes the one on the thermostat housing is) just no fuel and no cels.
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Old 08-26-2013, 01:08 PM
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Default Re: h22a swap in 96 prelude

yea you need the resistor box, you might have damaged the ECU trying to start it without one. get a resistor box and see what it does, if you get fuel but still have an issue, blame the ECU next
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Old 08-26-2013, 01:14 PM
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Default Re: h22a swap in 96 prelude

okay is it a dsm box or do they make one to buy online?
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Old 08-26-2013, 01:29 PM
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Default Re: h22a swap in 96 prelude

you could buy one online but they're prob overpriced for what they're really worth. you can use a DSM one, I don't remember the difference between the plugs though. anything that has low impedance injectors will have one, and the wiring is fairly simple to convert to whatever application you need.
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Old 08-26-2013, 01:35 PM
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Default Re: h22a swap in 96 prelude

No, you don't need a resistor box with obd1 injectors, they are already high impedance so it isn't necessary. Obd0 injectors need a resistor box because they're low impedance.
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Old 08-26-2013, 01:54 PM
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Default Re: h22a swap in 96 prelude

Eh, OBD1 JDM Prelude/Accord injectors are low impedance, that's how I know you can kill a P13 trying to run without a resistor box.

Edit: Might even be USDMs as well, deff the OBD1 Prelude/Accords though. I don't fuck with USDM H series though.

Last edited by 83Stang5.0; 08-26-2013 at 05:41 PM.
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Old 08-26-2013, 02:19 PM
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Default Re: h22a swap in 96 prelude

Good catch, I forgot those are oddballs for whatever reason Honda decided to do that.
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Old 08-26-2013, 02:30 PM
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Default Re: h22a swap in 96 prelude

I'd imagine the whole peak and hold vs saturated thing, and the fact that they used bigger injectors (310+ cc)
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Old 08-26-2013, 03:16 PM
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Default Re: h22a swap in 96 prelude

whats the jumper plug?
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Old 08-26-2013, 05:40 PM
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Default Re: h22a swap in 96 prelude

If you're running high impedance injectors(so you don't need a resistor box), there is a "dead/jumper" plug that plugs in where the resistor box goes. This basically connects the injector signal wire to the 4 injectors. You need the resistor box if your injectors are the ones for that engine. If you didn't need it, you can take a 6 pin dizzy plug, repin it correctly, and tie the 5 wires together.
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