Coil pack / Spark plug

[Stuwey]

Well, plugs and O2 sensor changed. Haven't scanned it since, but symptoms are still the same.

Sprayed some brake cleaner around looking for a rise in revs, hoping to find a split PCV hose, but no deal.


Bastard!

[sambb]

mate I've had the exact same symptoms as you - stumbling idle and missing beats when under way on full load/max torque rpms. Done plugs, intake smoke test, cleaned MAF, IAT, reseated all plugs eg crank angle/ cam position and rotated a new coil pack through each cylinder for no change. Had the car logged by European autotech and it turned up nothing. But when I ran a can of Subaru 'top engine clean' through it the other day which shows up exhaust leaks (whilst giving the head a steam clean), smoke was pissing out of the exhaust manifold to turbo gasket. I have the K03 though - don't know if the K04 is as prone to leaks.
Its $17 bucks sprayed straight into the inlet manifold where the SAI/N249 connects - cheap and easy and might turn up a manifold/turbo/exhaust leak that is changing the o2 content of the gases prior to the o2 sensor causing out of range readings for it or something?

[Stuwey]

Mate, at this point it's worth a shot.

Where does one obtain such a beast?

[brad]

Mate, at this point it's worth a shot.

Where does one obtain such a beast?

Subaru spare parts.

Sometimes you see it on eBay. should be around $18/can

[Stuwey]

I'm gonna skip the smokey bit and just do the turbo gasket change for some weekend fun.

Which way up should they go? Rolled-edge facing up, or down?

Local fastner shop stocks Nord-Lock washers

[Stuwey]

Thought. Cool pack loom (low-tension side) shorting out or similar?

Would this log a coil pack fault?

[h100vw]

Thought. Cool pack loom (low-tension side) shorting out or similar?

Would this log a coil pack fault?

Probably would, the ECU sees all kinds of shorts and open circuits.

Gavin

[Stuwey]

Got rid of the N249 last night with an IE resistor.

Car generally seems much happier. No more boost spike as you try to gently take off from the lights. Best of all, almost 99% of the stutter at idle is gone. Don't know how or why, but I'm happy!

[Stuwey]

So it's been a while now, driving about with the CEL on as I really haven't had time to get it coded out etc etc.

In the meantime, I've noticed that my AFR is up the creek. Started leaning off one afternoon (low 15s) whilst on cruise control. Awkward, I thought. A couple of days later and it then settled into high 13s or low 14 at best.

-pressurised the inlet, found a dodgy boost hose clamp.
-replaced the MAF as I thought it was plausible at its age and mileage.
-scanned the car with vag-com repeatedly but not turned up any fault.

I'm at my wits end with this. Drives fine, goes hard (particularly after the new MAF) and it's generally behaving itself, except for this bloody rich fuel ratio.

Clues, anyone?


Anyone?

[Eddy]

Hoyhoy.

Sorry Stu, wish I could help ya.