changed spark plugs last week to NGK BKR6EIX plugs on my r32 gts-4
a few days later..after driving for an hour that day..car loses power and sounds very lumpy..and very weak....the problem came on and off kinda that day cos i made a few stops with hour or so in between drives...but on the way home it happened again until i got home. next morning, car runs fine. problem came back again y'day after driving for an hour as well, but i did a lot of driving y'day with not that long breaks in between so problem stuck all day. this morning, car was fine again, havnt driven it.
also, since last week, my idle wen car is cold kinda moves up and down from 800-1000 for around 30 seconds, onli then it becomes stable at 1000..
soo..any ideas? is it the spark plugs? coil pack? i realli have no idea and need to have a look at it tomororw..as i'm too broke to take it to mechanic rite now. any help will be apprecieted and apologies for such a long story.! cheers