This obviously isn't Magna related, but I'm hoping someone might be able to shed some light on a problem my brother's having with his 1995 Nissan Bluebird.

After previous ignition problems (resulting in a new distributor, a new coil, new power transistor, new plugs and leads) the car was fine for months.

Over the past week, a new problem has shown up. The car will start fine, but then idles all over the place. Sometimes it runs fine, other times it's a bag of rubbish. There's a couple of things that we think it might be, ie. fuel filter (it looks as though it may be the factory original), the aftermarket alarm (there's a relay screwed to the body that occasionally arcs against the air con piping) or the coil, which seems to arc against either the distributor or cylinder head, regardless of the lead or coil (new or old) that we use.

This goes on all the way to redline, making the car pretty much undriveable.

Airflow meter and Idle Speed Control sensor could be faulty? Any chance you could get it put on a scantool type machine?

Airflow meter and Idle Speed Control sensor could be faulty? Any chance you could get it put on a scantool type machine?

That's pretty much all that's left, as well as the throttle position sensor.

If we can't get anything useful out of it, we'll probably try Nissan or an auto elec...

Oxy sensor might be worth checking aswell.

Oxy sensor might be worth checking aswell.

Funny that you mention that - we unplugged it, and the engine is idling pretty much perfectly.

Maybe it goes into a default map when the oxy is unplugged.

Mine used to do that too, not sure what the problem was in the end tbh. I adjusted my idle down though and it was floating around 1500 but would go down as low as 600 and as high as 2k so yeah :S
Since its fuel injected unlike mine i'd say it's one of your sensors, as said above.

~twiggy~

Pull codes, or spend $$$$$$$$$$ throwing parts at it.
Nissans are easy to fix, but you MUST pull codes.

Regards, Andrew.