Hi all,
Sorry for the long post but I wanna give as much detail as possible.
I have an R32 gtr which has been running fine until a couple of weeks ago. My problem began as an intermittent miss at high rpm's and this would only occur when the car had been running for over 20 mins. It wasn't anything real noticeable but I guess I should have taken it as a warning that something wasn't right.
Anyway this problem started to occur more frequently. It began to sound like it was running on 5 cylinders (a bit like a wrx sound) and lacked power but only when the car was up to temperature. I did a diagnostics test on the car and it was coming up with error code 21 which is the ignition signal system. Looking on the forums I saw that this could mean a few things were playing up with the most common thing I found being the ignition coils.
With the car running I couldn't see any arcing in the coils but before having a good look at them I inspected the spark plugs and found them to be in good condition however number 3 had carbon deposits on it. This made suspect that the number 3 coil was playing up.
Just to ensure that it wasn't the spark plugs I went out and brought a set of some cheap ngk's and put them in but the problem was still there. I then looked at the coil packs and could not see anything wrong with them from the outside, no cracks or distortion. For some reason, now I know it was probably a waste of money, I had it in my head it was the coil packs and went and brought a set of splitfires this was on Monday. Taking it for a drive it seemed ok at first but the problem showed back up.
On Tuesday I started it up and the problem was there as soon as I drove off but there was no miss while the car was idling. So it seemed to be getting worse. Today I took it down to Motortech in Wollongong and I have it booked in for tomorrow afternoon, there gonna put it on the dyno and see if they can diagnose the problem.
But this is where it gets interesting cause on the way home at certain points the car seemed to loose power, not completely shut off but just like it was being starved of fuel or something. I got it home and parked it in the garage and I could smell fuel. So now I'm thinking it's got nothing to do with the ignition and maybe more to do with fuel or the injection system. But I'm still getting error code 21 in diagnostics. Its beyond me what it is so I will leave to the guys at Motortech to sought out tomorrow.
Does anyone have any ideas what it might be?