Issues With Wiring Up An Rb20det Into S13

[tai_180sx]

Hey guys,

I have an RB20 that i've put in an S13 and i can't get it started. Basically the ECU is showing a fault on the ignition signal.

Can anyone tell me what might be wrong? From my understanding there are 2 main power wires going into the ECU and one extra power wire that only has power when the key is ON. All three of these work perfectly. I have the fuel pump running and the coil packs and injectors seem to be getting power, but I'm not actually getting any spark from the coil packs. Basically at the coil packs there is a power wire, and earth and a switching wire, the switching wire isn't switching and therefore i'm not getting any spark.

I would have thought that the ignition signal would come from the power wire that gives power to the ECU when the key is ON. Any ideas as to why it won't work?

[Duncan]

I don't know about rb20, but rb26 has a relay that is controlled by the computer. pin 58 gets perm battery power and based on other inputs the ECU will switch on the main ecu power relay (they call it eccs relay) to turn all of the functions on. is rb20 the same and have you wired it up that way?

[tai_180sx]

yeah everything has power that is meant to have power. both relays work fine. It seems to be that the error 21 was happening because the AUX power to the ECU in the standard CA18 loom was not powerful enough, so i've put in a relay and a thicker wire directly to the battery so there is now no more errors on the ECU, but the car still won't start...... I've tried heaps and can't seem to work it out.

[BH_SLO32]

Is pin 43 connected. This is the START signal for the ECU.

[tai_180sx]

oh yeah, I've connected pin 43 to the starter signal in the footwell of the S13.

[Dose Pipe Sutututu]

Check out my wiring guide as per my signature. Alternatively you can just search for it on NissanSilvia, it's in the technical section.

I had to re-wire my car because the workshop who did the conversion for the previous owner had ign, battery back up, eccs relays all going to the ignition power and they had the fuel pump always grounded (real smart).

[tairatcliff]

thanks mate,

I'll go over your guide on the weekend. I am very sure that I have done everything that in it already....

[Dose Pipe Sutututu]

remember, don't use the ECC power line, you won't get power to your ECU, because RB has it's own relays already, where as the S13 has the relays in the relay box in the engine bay.