Hello B15! I’m new here but have been reading up on some threads regarding power loss on the B15’s. I’m sorry in advance if this isn’t the correct thread. Mine is an 03 with 166,300 on the clock. Recently I have been having issues with intermittent power loss on acceleration and hard starting. Sometimes it fires right up and has no issues when driving, and sometimes it struggles to start and will have a hugely noticeable decrease in power, to where it will be really high in the rev range when the accelerator pedal is fully on the floor and the car barely accelerates. When it’s functioning “normally” the car has much better acceleration. I do have a code, P1138 which is for the swirl control valve on the intake manifold, however that code has been around for quite some time and never seemed to have any issues. I had it taken to a family member who owns a shop, he cleaned out the fuel rail and the code went away for long enough to pass smog, however when it did come back it never gave me any power issues. I checked the battery and alternator, both were reading 14v when running and the battery was about 13.6 when off I believe. Yesterday I replaced the fuel pump unit since I suspected the fuel filter was clogged and it’s all one unit, which immediately resolved the hard starts and for the 10 miles I drove it to get a fuel system cleaner and filled up the tank. This morning it started up like a charm, with temps being down in the high 20’s Fahrenheit, however it immediately had the same power issues until I restarted it about 2-3 times. Any information would be greatly appreciated!