Originally posted by Madic:
I had the exzact same problem on my car. I took it in and they said the IMRC was siezed. They replaced it and it was fixed. However the grumble studder shut off at 4k was still there. Im running a manual though btw. I pretty much believe it is the fuel filter or the fuel pump. It goes in hopefully tomorrow to get looked at for that. I find it fishy that both could go bad at the same time, specially since its happening to other cars. Well see what they say and Ill get back to you.
I thought I fixed mine with a new coil pack a couple of months ago, but I've been fighting the exact same problem for almost a year. It's never gotten bad enough to really shut me down, but I've gotten the "strangled growl and no accleration above 4k" mentioned by Shifty once recently, and have been living with the surge intermittent loss of power above 4k pretty regularly. I've pinned my secondaries and verified that the power let up / flutter is still there, so I too am considering fuel pump blockage. (~67k on the car now).
