Which boost controller did you install? The Hallman and the TurboXs install with the hoses connected opposite of each other. The Hallman Pro has a small vent hole in the fitting that goes to the Wastegate actuator. If you install the controller with the hoses reversed the turbo will act the way that you describe. On the TurboXS single or dual stage boost controller, the bottom fitting is connected to the waste gate actuator and the side fitting is connected to the pressure side. The Hallman Pro controller (I do not have the ES so I can't comment on the configuration of that unit, but I would imagine that it is the same, ES unit has no vent hole in the fitting to the waste gate actuator) the side fitting goes to the wast gate actuator and the bottom fitting goes to the pressure side. These controllers are adjusted in opposite directions to increase boost. The TurboXs unit is turned counterclockwise to INCREASE boost. The Hallman Pro is turnes clockwise to INCREASE boost. BTW I'm sure that the ECU has spit out a chk eng lite. Disconnect the Neg. Batt. lead for 30 seconds and then reconnect. If you do not, the ECU will continue to throw a code even if it is not reading a malfunction. It MUST be reset. Double check the connections and the adjustment direction of the controller that you have installed, and I'm sure that you can correct this issue. The boost controllers are fairly simple mechanical devices and are pretty reliable.
Good Luck !! [|)]
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