We bought an Audi 80 Avant 2.6 V6. At the beginning of February. The problem was concealed and played around, which we got wind only after purchase and after collection of it. Display was placed.The engine jerked in the cold start (sellers probably ran warm when watching and picking up). Turned between 1200 and 1300 revolutions and went out. Had baggers from 1200 to 100 (so almost off), but started again and ran up again too high. Qualted very strongly from the exhaust. Compression was at 3-4 cylinders well down. Between 5-8 bar. In the warm condition he ran well. Zog. Speed at 800-900 bar. Until he was warm I stood to house 10 minutes with the always spinning car around before I started. The last end he got hot and did not jump on yet. Engine was changed. However, the new engine got all seals and wedges and toothbelts (plus water pump etc.) again. Sprung at the first start directly. Lief on the first day he went great. On the next day he told us about the cold start of the old problem.