Just to add to this thread I am also having this ongoing issue. But have some added information. After the car gets to full warm up, it no longer shuts off under boost. But only after getting to full warm up, so I changed out the ecu thermostat sensor since that controls fuel/air mixture during cold and normal operating temp...But no change when still warming up, will shut down then not start back up until ignition is switch fully off then back on. For now I enjoy the car very much, but only after I let it warm up in the driveway first..lol...Or just keep it out of high boost until my temp gauge states its good to go. But dying to figure this one out, and yes I have tried another MAF..no change..uugg
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