Well, I fitted new HT leads (OE) and NGK Laser Platinum plugs and had the ECU reset last night then I took the car for a bit of a thrash.

Total result

The missfire, which had been getting much worse over the last couple of days (impossible to used more than 1/4 throttle and totally unable to overtake anything), has vanished.

The only down side was the cost of the plugs and leads

[Edited by tklimes - 11/3/2001 9:23:33 AM]

 

Noticed the other morning a slight hesitation when accelerating in 2nd at full throtle. It is nothing violent, just a momentary reduction in pulling power (blimey I've experienced that too come to think of it ) Any ideas?

 

I seem to get this too but only on damp mornings and it goes once the car's warm. Current top suspect are the HT leads which I hope to swap next week.

 

HT leads? Does that mean it would be kind of misfiring? Sounds OK though?

 

Yes, a kind of missfire - like one of the cylinders going down momenarily resulting in a loss of power. It's getting worse now so I think the lead change will be accompanied by new spark plugs - may try Bosch Super 4's

 

Had some NGK Platinums about 6 months ago. How often do they need changing?

Let me know how the car is after changing the leads

 

Slight change of plan - having spoke to the local Subaru dealer he said that it sould also be the coils breaking down - he will do a FOC check for me on Friday - I'll let you know what the result is.

 

Just to be sure, you do know about the "noise reduction" feature in the ECU right? When accelerating in 2nd gear at full throttle, you only get half boost if speed is held at 50kmh for "a few seconds" before full throttle is given.

 

tklimes - had 4 new coil packs fitted about 6 months ago! Used to get violent cut out before I had this done.

 

Rikki,

I took out the coil packs & plugs(NGK PFR6B's) last night & re-gapped cleaned plug & coil pack, re-fitted - the lot & most noticably (so far ony driven it 3 times) it doesn't misfire as often - you really have to let of the throttle & then blip the throttle to get it to misfire. It doesn't even sound as LOUD as before.

Mine was misfiring loudly & badly over the past few days - really embarrassing when pulling away slowly between 1.5K & 2K revs. It'd misfire when I even touched the throttle.

Other threads mentioned the precise position of the coil packs being important - I think I may try & fiddle with these over the weekend.

2 of the coil packs were scored & burnt more & 2 plugs darker - darker plugs I think came from the coil packs that were scored & burnt more.

Can anyone shed light on whether they'd be in fine working order. Plugs went in about 3K ago.

Johny.