Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - SR swap running issue-you'll have to be pretty smart for this one.....

Spdrules5 · 10-12-2004, 12:35 PM

I replaced the wire harness with a '98 blacktop wire harness with ignitor from a friends '89 coupe with blacktop that runs perfect. Still the same thing, runs on two cylinders.
i pull each coil pack with spark plug and turn the motor over and it throws spark across the gap on the two cylinders that aren't running.
When the engine is runing, I pull the plug to each coil pack individually, and only the 2 inside cylinders make a difference. I unplug the MAF and it makes no difference in idle, BUT, I can rev way past 2500 rpm's.

That is why this is killing me. It makes no sense. Coils and plugs are all getting power, signal, and spark when checked individually, but put it all together and it only runs on two cylinders.

I'll try the screwdriver on the injectors today.
Thanks for the thoughts, please keep them coming.

10-12-2004, 12:35 PM	#8
Spdrules5 Zilvia Member Join Date: Sep 2003 Location: So. Cal. Age: 53 Posts: 251 Trader Rating: (0)	I replaced the wire harness with a '98 blacktop wire harness with ignitor from a friends '89 coupe with blacktop that runs perfect. Still the same thing, runs on two cylinders. i pull each coil pack with spark plug and turn the motor over and it throws spark across the gap on the two cylinders that aren't running. When the engine is runing, I pull the plug to each coil pack individually, and only the 2 inside cylinders make a difference. I unplug the MAF and it makes no difference in idle, BUT, I can rev way past 2500 rpm's. That is why this is killing me. It makes no sense. Coils and plugs are all getting power, signal, and spark when checked individually, but put it all together and it only runs on two cylinders. I'll try the screwdriver on the injectors today. Thanks for the thoughts, please keep them coming.