Vehicle: 2004 Subaru Forester XT Mods: Cobb Catted Downpipe, Cobb Up Pipe, Grimmspeed Phenolonic Spacers Engine Management: Cobb AccessPort Problem: Vehicle is not hitting or getting close to target boost. I'm only reaching around 10-11PSI when the map calls for 15-17psi. Also the vehicle definately feels a little laggier. The vehicle drives perfectly fine. It just doesn't have the pull like it did prior. Things I have done: - Check all hoses and line - Checked for Pill (it's there) - Changed Throttle Body Gasket - Swapped out BCS - Unhooked line to wastegate (Boosted to 14.6psi via Cobb AP) Recent maintenance/modifications: I had to change out the Knock Sensor because it was throwing code P0327 Knock Sensor 1 Circuit Low Input. I had to unbolt the TB to get another bolt underneath it. (FXT's BPV line is clamped on to a hardline under the TB) I'm going to be creating my own boost leak tester and try to see if there are any leaks that I may have not seen visually. Here is a datalog of 3rd gear WOT -
Nuke fixed my low boost issue when he tuned my FXT. In my case, it was the wastegate arm. Check with NF and they should be able to help.
