Hey guys. So I bought a 1994 R32 GT-R. Car drove amazing when I first got it. It only has 84,500 km's on it. The weekend of the week I picked it up. I decided to do a service which entailed:
. Oil
. Oil filter
. Air filter
. Rocker cover seals and half moons
. New front brakes
. Fuel filter
. Iridium spark plugs
The car already came with splitfire coil packs.
After driving for a couple of days, I noticed my car started to have a bit of a stutter. Wasn't bad. Few weeks later I went for a drive was stuck in traffic for a bit then when I started to drive it started to misfire severely. It started to sound like a wrx. It was a warm day but it never used to do that. Took it to an auto electrician tested everything possible that could cause a misfire and everything was getting power. Did a comp test all cylinders had the same reading. Changed coil packs and spark plugs and it still does it. When it's first started and driven it's fine. As soon as I drive for 30 mins it starts to miss. Even if I have short drives, turn it off start it again it struggles at idle thwn revs pick back up. I lose alot of power and is super sluggish!
Any ideas on what it could be?