Need Help: Engine Malfunction

[34GT]

hey guys, i hope someone can help me with a little problem ive got.

Late last week is was driving up to an intersection and all of a sudden engine malfunction light came on and started to run on 5 cylinders.

I then got an engine diagnosis done and showed that it was an ignition problem and a break down in the 2nd cylinder.

First check that i did was removed plugs and coil packs and inspected both, spark plugs were in good condition and coils worked good. The way i checked was to crank the motor over whilst placing the plug and coil to the rocker cover in which produced a blue spark, this showed all was fine.

I then checked the resistance of all the coils and all where within spec.

I then changed the spark plug in 2nd cylinder with a new one just to make sure and still had the same outcome of running on 5 cylinders.

I then removed one by one the injector plugs to see a difference in quality of running, by doing this every time i pulled an injecter plug off it would worsen except for the dreaded 2nd cylinder where it just stayed the same.

Note: When cold it runs fine on all 6 cylinders for about 30 seconds and then the malfunction lights comes on and starts breaking down.

This morning i started the car and for some unknown reason i decided to hold the revs at 2grand, it ran good for a further minute until i released my foot and let it idle, it then dropped 2nd cylinder again. It continuosly runs on 5 cylinders, never better never worse, it feels like a datsun sunny ha ha.

Ive got it booked in at nissan on tuesday but if anyone has anymore ideas on what i could do, it might save me alot of money that i dont have.

Regards

Eli

[Amec]

sounds like it could be injector signal, easy to test with a noid light.