I'm running a 93 wrx, could any of you fine gentlemen let me know what plugs to use and the easiest way to fit them.

thanks
ian

 

Ianst
NGK PFR 6B These are the spark plugs that we fit to all imprezas
the easy way to fit them is take it to a garage because they are akward and are easy to cross thread

regards dave

 

Subaru Manchester, are you anything to do with Hynes? Are you a dealership or similar? Just humour me if I'm getting confused etc.

ps. I'm in a red 97MY (post facelift) Turbo reg H1 RPV, Central Manchester area - you?

pps. Yeah, NGK are the recommended sparks.

[This message has been edited by Dobbo (edited 26-02-99).]

 

Dobbo.

My understanding is that subaru manchester is C&K Motor Engineers, (rolling road tuning specialists) Manchester.

 

There's a translation of some useful bits of the Jap impreza manual at http://www.cerbera.co.uk/subaru/Default.htm

select "japanese manual translation" under the "sources of information" header.

This recommends PFR8B for the wrx?

Dave, do you find the PFR6Bs are ok? - I tried them in my '95 STi V2 type RA and they wore out in less than 3,500 miles - does this mean there's something dodgy with my ignition/mixture? I use 98 RON. I know the cars got a weird ignition with like a little individual coil for each plug - i don't know if this is the same as all imprezas?

I got 8s put in last month so its too early to tell how they're lasting.

I'm not sure what the difference between a 6 & 8 is, tho. i think it might be to do with the heat range.

i agree fitting is very tricky - and expensive if you cross-thread 'em.

 

From a reliable source - PFR8B - mostly town driving. PFR7B - mostly motorway. The latter being a slightly cooler plug, but would foul up in stop and start traffic.

 

At the "dyno day" last Saturday (Power Engineering, UK), my car (UK MY97) misfired a bit at around 6,500 rpm. Power Engineering said this was a common problem when running higher than usual boost if the plugs were on their way out.
Mark McE - when you say yours wore out after 3,500 miles - what were the symptoms? Misfires? Anyone else had misfires?
Thanks.

 

Yeah, occasional misfire, generally not quite as sharp pick up, rough running from a cold start. Just doesn't feel quite "right".