Second cylinder not firing... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

A18 · 03-09-2012, 10:05 PM

So my car isn't firing on the second cylinder. The injector for the second cylinder won't fire, but the injector works fine. I switched the injector from the first and second cylinder and it made no difference, the second cylinder still didn't fire so I know it's not the injector. We checked the connector with a noid light and the light lit up on all the cylinders other than the second one. My buddy got a new connector from work and we replaced that, and it made no difference.

I asked my other friend about this and he says its either the PCM (aka ECU) or a short in the wiring. I can't find any frays or breaks in the wiring, so I'm thinking its the ECU.

If it is the ECU, do I have to replace the ECU or is there anyway to fix it? Can I use any ECU from any R32 gtst, or did the ECU undergo any changes in 92+ to match the rest of the changes (headlights, grey gauge cluster, etc) making it incompatible with the 89-91s? This is for a 1990 skyling gtst btw.

Finally, does anyone know what a used hcr32 ecu goes for these days? PM me if you have a working one for sale, preference given to locals and lowest priced, obviously.

Thanks for you help guys!

*StryfeS13* · 03-09-2012, 10:09 PM

Maybe follow the wiring and trace it to the problem?

A18 · 03-10-2012, 10:48 AM

Quote:

Originally Posted by StryfeS13

Maybe follow the wiring and trace it to the problem?

The wire starts at the injector and goes all the way to the ECU. There was a fray in the wire, but that got fixed so I don't think its an issue anymore.

03-09-2012, 10:05 PM	#1
A18 Leaky Injector Join Date: May 2008 Location: BC Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	Second cylinder not firing... So my car isn't firing on the second cylinder. The injector for the second cylinder won't fire, but the injector works fine. I switched the injector from the first and second cylinder and it made no difference, the second cylinder still didn't fire so I know it's not the injector. We checked the connector with a noid light and the light lit up on all the cylinders other than the second one. My buddy got a new connector from work and we replaced that, and it made no difference. I asked my other friend about this and he says its either the PCM (aka ECU) or a short in the wiring. I can't find any frays or breaks in the wiring, so I'm thinking its the ECU. If it is the ECU, do I have to replace the ECU or is there anyway to fix it? Can I use any ECU from any R32 gtst, or did the ECU undergo any changes in 92+ to match the rest of the changes (headlights, grey gauge cluster, etc) making it incompatible with the 89-91s? This is for a 1990 skyling gtst btw. Finally, does anyone know what a used hcr32 ecu goes for these days? PM me if you have a working one for sale, preference given to locals and lowest priced, obviously. Thanks for you help guys!