S4R running on one cyclinder (intermittent)

[Palooka]

Guys,

    Yesterday morning she ran fine on the way into the office but when I went to start her to go home she wouldn't idle and I realised she was only running on one cylinder (horizontal one). Today when started she was back to running on both.

I had the same problem a couple of months ago and nothing I did resolved the problem. She just started running right again.

Any thoughts on where I should look? The obvious things like loose connectors have been checked.

Thanks
Palooka

[yotogi]

What do the plugs look like? I could see fouling one maybe, but 2 seems like a stretch. Pray it is something simple, but I have the fear on this one.

[Palooka]

Plugs are pretty much brand new.

??

[vwboomer]

I can't help ya but I did have a similar problem last year. Happened about a dozen times throughout the year and hasn't happened since. Always the horiz cylinder didn't fire.
Try changing the coils around to see if it changes which cyl doesn't work. This didn't make a difference for me.

[Speeddog]

Make sure the coils are seated *all* the way in, it's a pretty stout push.

You've checked the injector connectors as well?