Hi,
At first, my english is not perfect, Im sorry. But I try: I have 3 years old 406 HDi (66Kw with chip), mileage is 196000km and it has a serious fault. When I drive slowly with 1st or 2nd gear, car/engine not drives smoothly. It "jumps" like somebody kicks to back about every 1 sec., and when I try to accelerate speed, engine sleeps few seconds and then it starts to work correctly. With cold engine problems are more seriously than with hot engine. accelerate-effect with cold engine is like old diesel-mercedes with caravan. In highway HOT engine works well. But when I slow down speed and engine is running idlespeed, something accelerates engine smoothly +500rpm every
1 sec. Has anybody have same problem in HDi-engine? What could be damaged part? When problems starts, car`s fueltank was pretty empty, and I just thought that could it be damaged fuelfilter, if fuelpump pushed water to the filter? Filter is just renewed. I thought that some possible faultpoints could be (...could it?):- Fuelfilter
- Air mass meter (Is it so sensitive in HDI than in TDI?)
- Turbo pressure sensor
- Gaspedal potentiometer (beside air mass meter)
- Fuel pump (in the tank)
Z Bremer