Coilpack issue... or not... ?

[scooby-wrx]

Hey guys, my car starting hesitating a bit last night (never done it before) I thought it was the AMF, felt like it was running on 3 at low rpm (fine when I accelerated).

I checked a few things today and found this (see pictures) one one of the connectors (on the coilpack). The lead which connected to this connector was also slightly marked. luckily I have another set of leads and a few coil packs lying around (as most Subaru owners do... )

It looks like water has seeped in there somehow... ??? I'm about to take it for a quick drive, anyone know what the cause of this could be and if it would cause a problem...? Cheers.

The other 3 are fine:

[Guest]

Usually a resistance build up cause's this,

and usually its leads

[scooby-wrx]

Ichi Ban makes sense, thanks allot. Appreciate it

I just got back from quite an extensive drive (made sure I had spares and tools ) and its running much better now, hopefully that's the problem solved.

[cuscogtb]

So did replacing the coil fix it?

My car has the same issue. Pulling up to the lights etc with the clutch in causes it to almost stall, and sometimes does stall.

It used to rarely happen but lately its been like that every time I drive. Only happens when engine is warm.

Changed the plugs last week and still the same, but while changing the plugs I noticed one of the old plugs had a little bit of that green build up.

Could that be causing the problem? Been reading around and some suggest it might be knock sensor.

Car is BH5 running possumlink.

[gotasuby]

Try tweaking idle Rpm when warm as you have a possumlink

[cuscogtb]

Is there anything else I can try first as I don't have a hand controller

[Kiwi_Fozze]

disconnect battery, clean inside of coilpack sockets with a bit of skotchbrite or similar, replace leads?