demon dub

ive only owned this car for 3 weeks& only managed to drive it for one of those,problem is after driving it for a couple of hours it seems to drop in power,then give a smell of fuel from the exhaust(as not burning fuel) & engine note changes(misfire)..then it can clear only to come back again,leave it a day & you can drive again till its hot...

so far ive fitted new genuine ngk plugs from subaru,4 new coilpacks,cleaned the turbosmart dumpvalve,checked the vac pipes were i can get at,also ive unpluged maf while running to see if it cuts out,

i know when its going to do it,at idle(traffic lights)revs drop low(500rpm)followed by them raising to smell the wiff of fuel for a sec then the ruff running,since ive had the car when you drive norm you can hear a hiss while on the throttle,let off it goes after a sec or 2,checked cooler pipes,&d/v pipes
help me please as i want to enjoy my new pride n joy,cheers

demon dub

started the car again today just to find the misfire there all the time???
any ideas?cheers

samcowrx

not sure about the hiss, but could an injector be playing up?

samcowrx

Lambda might be worth checking also, have you ran it really low on fuel at all?

demon dub

yep,ive only had this 3 week but when i bought it it was running on vapours as the lad left nowt in it,could only find a supermarket so put that crap fuel in....i know thats bad but how bad is it?...what could i hav done?cheers