Help with spark plug high tension lead position

[kuwylas]

When I changed the spark plugs today on my 2002 Protege ES, I disconnected the wire coming from one of the ignition coils to the adjacent plug cap for easier access. The service manual refers to it as the "high tension lead." Picture is attached with the connection circled.

I realize now this was a bad idea! I didn't notice until I was reconnecting it that there are numbers imprinted on the connector boot. The service manual says:
The high-tension leads must be reinstalled to their original positions. Incorrect installation can damage the leads and cause power loss, and negatively affect the electronic components.

Based on the way the wire held its shape, I think I got it back pretty close to the original position (about at 7 looking straight on from the top and reading at the center).

What is affected by this adjustment? The relative timing between the two cylinders on the same coil?

What happens if I get it wrong? When I tried it at 5 the engine idled higher than normal (>1200). It's still a little bit higher than normal (800 - 900). Do I just need to give the ECU time to adjust or should I keep messing with it?

If somebody else with the same engine read off what theirs is adjusted to could I set mine to the same setting or is it not necessarily the same for different cars?

Thanks!

 

[kuwylas]

Turns out it's not uncommon for a car to idle high after changing spark plugs. I ended up driving it for about five minutes and that was enough for the ecu to adapt. Idling in the normal range now. I'm not going to worry about it any more.

Still not sure what the high tension lead position is supposed to affect. If it's timing between the cylinders it can't be by much since the connector just looks like a banana plug with a notch out of it on one side.

 

[slavrenz]

I'm not quite sure what your question is. You want your leads to look like the picture on the right, as all 2001+ Proteges with the 2.0L engine are "FS". I don't know what you're talking about with all this adjusting. Just plug the wires in and you're good to go.

 

[kuwylas]

There are sequential numbers printed around the edge of the connector boot so it looks like rotating the connector is supposed to affect something.

Not worried about it since it wasn't the cause of the high idle. But it would be nice if the service manual explained what it is supposed to do since it's supposed to be reinstalled in the same position.