I better start at the start, incase any of the information is useful
I Bought myself a '92 R32 GTS-t last wednesday, with 155500km on it (appear genuine). It had a Turbosmart V-port BOV, a Really Dirty K&N Pod Filter, some form of 3" Catback exhaust.
Wednesday night, i took it for a drive on the highway, and i noticed that above 4000rpm it was 'missing', i.e. a cylinder wouldn't fire, but other than that, the car seemed to run fine.
I took it for a service today, and put new Motul 4100 Turbolight oil, new Oil Filter, and NGK BCPR6ES plugs. While they were off, we tested all the coilpacks and they all tested at around '1' resistance.
The plugs that were in there were a mix and match of all sorts, completely wrong heat range etc etc.
Anyway, after i left the service, i noticed there was now a miss at idle, only slightly, and only very occasionally, it just wouldn't fire a single cylinder.
Went out to willowbank for the day (spectating at the sprints) and on the way out, it still had the miss above 4000rpm.
On leaving, i gave it a bit of a squirt on the highway and the miss above 4000rpm was 'semi' gone... like, it feels nowhere near as bad as it used to, but it still doesn't feel 'right'... and general running seems a tiny bit rougher than it used to be. Idle also has a slight miss in it still.
I guess the question is, what are your opinions as to what could be causing the problems?
Oh, and i also am resetting my ECU tonight to see if it is something that it has learnt along the way.
Any ideas/help would be great... thanks
Jason