darkar26

Im hoping someone can once again shed some light on my latest issue??
my subaru my98 uk has developed a slight misfire on tick over and a bad misfire/hesistation under boost with a strong smell of petrol from the exhaust?
I have just replaced the plugs thinking it was this with a set of plugs that have 4 electrodes rather then a single but this has made no difference?the car had a induction kit fitted when i purchased it last week but i have put the original airbox back on with a k n panel filter which was washed and dried then kn oil sprayed onto it.The missfire and hesitation is getting worse under load,If i drive the car with no boost it does not miss??

PJB1

Coil pack

madscoob

iTrader: (3)

connect the black wires under dash/drivers side and do a code check,odds on it comes uo 32 o2sensor. if it isn't clean the maf with sensor cleaner or electrical contact cleaner

darkar26

hi checked ecu for any codes and all is clear.

darkar26

i took off each ht lead and the coil pack has a healthy spark from all 4 outlets??

darkar26

This missfire/hesitation problem has got slightly worse everyday for the past week.The smell of fuel from the exhaust is quite strong?no smoke from exhaust.2 of the ht leads on 3 and 4 (right bank as you look at engine are chaffed where they push into the little holders but no sparks coming from them?(checked this in the dark)

darkar26

I looked at other posts on here and disconnected the maff sensor and the engine died?left it off and restarted the car with it off.Other then all the above mentioned i have not got a clue,Im not going to give up on this car as i love it,im willing to try anything you guys may think it is.

PJB1

Could still be breaking down under load, I had 2 coils with slight cracks in on 95 classic so diff to yours but had ok sparks

darkar26

Ok i will get a replacement and see what happens,i just took off the maff and sprayed it with some electrical cleaner and found a 90% improvement,this was from cold so i cannot rule out the coil breaking down when it gets hot??>thanks for your reply.

chris1975

Could also be a boost leak.

darkar26

how do i check for boost leaks?

madscoob

iTrader: (3)

the oil from your filter had got on the hot wire of the maf, causing a false reading. don't oil the filter next time lol

darkar26

lol good advise and thankyou