Hi all, all advice welcomed - my R320 has a loss of power unless its on boost which is making it undrivable in town unless manually changing gear.
It's just had a new turbo fitted by my garage after the old one destroyed the vanes, on fitting it threw a Y77/1 boost pressure regulator code, they investigated the actuator even though it came with the new turbo and it turned out to be fine and eventually narrowed it down to the swirl flap motor which they deleted, along with the EGR for good measure and put a new map on to compensate.
It now pulls like a train on boost but it's like it's got zero torque and will slow down to the point of nearly stalling if going uphill below about 2000rpm even moving the accelerator up or down (before kickdown) has very slight effect making driving around town a series of foot to the floor dashes.
They've relooked at the map and are happy, checked for boost leaks, rechecked the actuator, checked the fuel rails, the boost sensor and exhaust back pressure sensor have also been checked.
Any ideas what's next?
It's just had a new turbo fitted by my garage after the old one destroyed the vanes, on fitting it threw a Y77/1 boost pressure regulator code, they investigated the actuator even though it came with the new turbo and it turned out to be fine and eventually narrowed it down to the swirl flap motor which they deleted, along with the EGR for good measure and put a new map on to compensate.
It now pulls like a train on boost but it's like it's got zero torque and will slow down to the point of nearly stalling if going uphill below about 2000rpm even moving the accelerator up or down (before kickdown) has very slight effect making driving around town a series of foot to the floor dashes.
They've relooked at the map and are happy, checked for boost leaks, rechecked the actuator, checked the fuel rails, the boost sensor and exhaust back pressure sensor have also been checked.
Any ideas what's next?
