Emil

fitted a new set of iridium tips NGK's today,along side brake pads/discs and oil change (took only 5hours for the lot)

while i was taking the plug out from under the throttle body,water (from the gold bolt),came out,and it went over the old plug,i stopped it asap.
after i turned the car back on once everything was put back,got a missfire,it's there on idle,and sometimes on throttle,i guess this can be the only explanation?

car was perfect before,and still is bar the miss fire,taking everything off again tomorrow to find an explanation,anyone help in any way?

i know on the Skyline's,i could unplug each coilpack and find out which one was faulty,last time i did that on an IS,the engine shut it self out,so is there any way that i can figure out which cyclinder is causing the miss fire?

thank you

jcat_350

some water probably got in with the plug. I'd imagine eventually it'll burn away, but if it continues the plug may be fouled.

Emil

would you say it's a good idea to just go for a long drive? i'm taking the plug back out tomorrow and checking it,thats the only one i'm worried about!

why coudldn't be as easy as the civic,lol

jcat_350

I would just drive it as normal and see if it goes away. If not, then like i said pull the plug and make sure it's not fouled.

If things on this car were as easy as on a civic we wouldn't be respected as much for owning one.

Emil

thanks for the reply
and thats true,but even the skyline wasn't as hard as this

jcat_350

most cars aren't. remember the commercial, behind every detail, there's a detail. As frustrating as it may be, just think of the ridiculous amounts of money the lexus engineers get paid to cause us these headaches

Mr Jokster

iTrader: (8)

How about gap issues? Could have a bad gap on one or more as well... too close to far = bad spark?

Mr Jokster

iTrader: (8)

oh wait... they're iridium's... never mind.

Emil

well it got worse today,now got the VSC lights up along with the ECU,and missfiring got a bit worse now aswell,driving it isn't the same
it's all coming off tomorrow for me to ivnestigate further

jcat_350

thats just the car being pissy and going into limp mode because something's not right. I'm betting the plug is fouled.

GS4_Fiend

iTrader: (22)

check the code

Emil

how can check the code? after connecting to the OBDII reader in dash,one person said the reader had no power to it,another found no code for light

[ant]

i would also be suspect of Iridium plugs in general. i havent used them on my Lexus, but i had Platinums (as stock) in my old S13 turbo, and they were just due a change. i thought id try the new Iridiums instead of Platinums as they were the same price, put them in and as soon as the car got on boost, Misfire. So i put the old dirty Platinums back in and all was well. I then ended up getting just simple Copper plugs and changing them every service (easy on that car).
if i were you it may be worthwhile trying the old plugs back in there :P

Emil

right,i guess i'll give that a go next then,but as said,it shouldn't really be there should it if it was plugs?