[COLVERT]

Originally Posted by mbonwick

Or it could just be that the spark gets drowned more easily at the larger distance.
As it's two different sets of plugs I'm using (Bosch/NGK) I don't think we can directly conclude it's an ignition issue.


If it was spark related, I'd expect to be seeing issues at higher revs/hard acceleration which there just aren't. I also find it hard to imagine that I've got 2 failing coils, especially as they're only 3-4 years old.

Are the plugs sooty when you check them ??

You think it's running rich. Normally a rich mixture is necessary to start a cold engine but your engine is harder to start from cold. Odd.

Large plug gaps normally make an engine easier to start but the spark can fail to jump the gap at high revs and cylinder pressure. It just tracks down the electrode surface.

The standard gap should work perfectly at all revs.

Your need to modify the gap could mean the mixture is too weak or too strong so I guess you need to find out the cause of the varying mixture.

Best of luck with it.---