Dear Scotty, big fan! I have a 2003 Subaru wrx turbo with a 5 speed manual transmission with 193k miles that is mostly stock. It has a Cobb stage 2 package with an accessport. When I press the gas from a compete stop the car would cut out between 1000-2000rpms. Does it every now and then. Also it sometimes doesn’t accelerate well. What could be the cause. So far I’ve checked injectors, plugs and coils. Thanks and have a great day
Check your fuel pump. I can most certainly say that your fuel pump is not adequate to meet the demands of your COBB stage 2 tune. You're fuel demand increases when you tune the car, so if you don't have a stronger fuel pump, you're going to have less fuel "on-demand". Use a scantool to check the fuel pressure (I'm sure your access port will do that for you) and consult with COBB for the recommended fuel pressure for running stage 2.
Change your fuel filter too.
