This afternoon, I fitted a used speed sensor of eBay as I crushed the original one while fitting the engine. I also replaced the vac lines to the fpr, and DV. The boost gauge is tee'd into the DV vac feed. After a test drive, I have an issue with the rpm. It carries on rising after I lift off the throttle for about 1000 rpm then slowly drops down. Seems I have invented No Lift Shift without touching the ecu lol There is a fault code 17748 - Camshaft position sensor (G40) / engine speed sensor (G28) P1340 - 35-00 - incor. Correlation. Do I need to calibrate something with VCDS. I had no other faults with the damaged speed sensor when it was electrically disconnected, just a non working speedo and no signal from speed sensor.