My 2000 Audi A6 2.8 V6 having trouble starting in a really cold weather. This problem occurs for past 6 years. Previous owner took car to dealership 5 times. They couldn't find the problem.
When you try start the engine the starter cranks but the engine won't start.(Sounds like "dry" crank)After several attempts the engine starts but missfires, shakes, backfires. If you let engine run for minute or two and turn it off, it will start back up without any problems. Mechanics at dealership tryed change spark plugs, plug wires, couple injectors, flushed the fuel system tested computer-the same result. It runs o.K. And starts when the engine is warm, but in a cold winter morning no.
I put new spark plugs, Karlyn wires, Karlyn ignition coil pack, new battery-the same problem. It takes 10-15 times of cranking till you get engine run. After it runs for minute or two no problems, starts right away. Yesterday I took to shop, hooked up computer and everything works fine, no cylinders missfiring O2 sensors o.K. Fuel system o.K. Everything normal. We deleted faults. This morning the same problem Won't start and the check engine light came on. Please advise. Thanks.