Hi there. A year is a long time to be suffering those issues. Can you share some more info on the car. Mileage? Can you share the exact fault codes from a scan ? Is the Intake manifold and associated sensors still original
Is the car tuned ?
Yes it has been going on for nearly a year and just been from garage to garage. Its completely standard other then a resonator delete. I did have it mapped to a stage 1 but had it reverted about a few weeks before the issues occurred and had done a 1000 odd miles or so before anything happened. It has been re-flashed again with the latest VW ecu file but made no difference.
Fault codes are:
Cylinder 1 misfire
Cylinder 4 misfire
Cylinder 1 misfire under direct injection
Cylinder 4 misfire under direct injection
Multiple cylinder misfire detected.
Intake and sensors are all original other then the pre cat 02 sensor this has been replaced with a genuine VW Part.
MAP sensor has been tested cleaned and retested but no difference and seems to be fine.
Mileage on the vehicle is 71143 exactly.