If this is a FD, check that the MAP sensor vaccum hose is connected. The MAP sensor is located on the firewall, near the Throttlebody. ( If a JDM car it would be on the passenger side of the firewall.
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Also, I the air pump still on the vehicle? Timing is hard to mess up with the FD as the pullies are fixed in one direction and the CAS sensors are fixed as well. My guess is a vaccum line has come loose someplace. MAP is most common.
Inspect the Voltage for the TPS as well in all ranges. If you have a PFC and commander, you can check it thru the sensor check screen.
Dave