The Xede is a piggy back system that lies to the ECU rather than actually remapping the ECU itself. Those systems include CPEs Standback piggy back. They have a lot of issues. Xede can be customized but very few know how. It is pretty much obsolete for our platform after tuners cracked the ECU code a d could directly modify most of the ECU map. Most custom tuners are using Cobb Access Port or Versatune, which are true remapping. Others (myself among them) use the versatile plug and play Hypertech, which is also a direct ECU remap. Almost no Mazdaspeed 3s run Xede.
I'd leave it alone to begin with until you troubleshoot more. Explore all connections for a boost hose or vacuum line leak. What "pop off" valve (BPV) do you have? You may have a leak there. The stock BPV, which means bypass valve, is really best for this engine. If you still have it swap out and see if that helps. Make sure you have the recirculation hose connected as this engine runs best by not permitting metered air to vent to atmosphere.
Do you know how to do a boost leak test by pressuring the post MAF intake with a regulated pressure source at 15 psi to test for leaks? That may locate the problem.
I'd leave it alone to begin with until you troubleshoot more. Explore all connections for a boost hose or vacuum line leak. What "pop off" valve (BPV) do you have? You may have a leak there. The stock BPV, which means bypass valve, is really best for this engine. If you still have it swap out and see if that helps. Make sure you have the recirculation hose connected as this engine runs best by not permitting metered air to vent to atmosphere.
Do you know how to do a boost leak test by pressuring the post MAF intake with a regulated pressure source at 15 psi to test for leaks? That may locate the problem.
Last edited: