I got Audi a6 2.0 motor, up her in Iceland, no one gets to the problem, it is like it looses a stroke, in driveing,but have the power stll the slow run is un easy like 2-400 rpm, up and down changed knock sensor the computer does not show it and the garage guys just scratch their head....thank´s...Gudmundur, e-mail : [email protected]
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Re: motor running badly
See if you can get a product called Seafoam (I'm sure it's available online if you can't find it locally) and do a full treatment on your car - you'll need two cans. One can in the gas tank, then fill up on top of it. With the second can, pour half into the oil, drive about 30 miles, and change the oil and filter. With the remaining half, pop a vacuum line off the engine with it running, and feel for suction. Where you have suction into the engine, attach a hose and let the engine **** up the rest of the Seafoam. You may need someone in the car with their foot on the gas pedal to keep it running (hold the revs around 2000 RPM while it sucks up the Seafoam so it doesn't stall). You'll see a ton of smoke coming out the back - that's what you want. It'll burn off all the carbon deposits in the engine. Let it run a few minutes, then shut it off. Wait 15 minutes, restart the car, and let it burn off the rest, revving the engine occasionally. It may smoke awhile, even a little bit the next day, but it'll all burn off fairly quickly and should clean your motor out nicely. This may take care of your stumbling problem.
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Unbalenced wheels..Bad tiresBefore 80 is too slow it will shake and wave and vibrate.After it can stabilise or get worse.Last:bad motor sensors:air intake,valve timing etc. If not ruff acceleration (rpm related vibration) then is the wheels related (unbalanced,bad/defect tires,low air pressure,loose nuts...)A windy weather also shakes u well :)))Cheers.
Sounds like your alternator might be bad or your engine belt is loose (or broken). If you can get the car started, check voltage at the battery. If you have 12+ volts for at least 20 minutes, your alternator is ok. If you have less, it's bad.
This car doesn't have coils and wires, it's gasoil. The most likely reason is the piezo injectors are worn. The best way to test is with VCDS After an overnight stationary period drive the vehicle with cold engine between 1200 - 1600 rpm till the complaint occurs. Constantly read the measured value block 13 and 14 for the smooth running control in the engine control unit. The values of one or several cylinders should noticeably move to positive.
modified injectors A8: with 3.0l, 4.2l TDI from: WAUZZZ4E*7N016685 Replace the injector with the highest deviation and all injectors produced between 1.3.2006 and 30.4.2006. Example of production date: 060304 stands for 4.3.2006 vcds go to address 01 measured values below 013 Smooth running control1)Cyl. 1 Injection quantity variation[mg/stroke]2)Cyl. 2 Injection quantity variation[mg/stroke]3)Cyl. 3 Injection quantity variation[mg/stroke]4) VacantPermissible values at idle: +- 2,99 mg/strokeA If the permissible tolerance is exceededfirst check injector IQA-IVA adaption values 014 Smooth running control1)Cyl. 4 Injection quantity variation[mg/stroke]2)Cyl. 5 Injection quantity variation[mg/stroke]3)Cyl. 6 Injection quantity variation[mg/stroke]4) VacantPermissible values at idle: +- 2,99 mg/strokeA If the permissible tolerance is exceededfirst check injector IQA-IVA adaption values
you may want to check the pcv valve. i had the same problem, and it is because if the valve is bad then the air is nos passing through. it costs around 50 dls at the dealer and it is very easy to change.
to be honest i would need to drive it to know for sure but it could be anything from the clutch ,loose flywheel bolts to a drive shaft or evan a deformed tyre,Sorry i couldnt give you an instant fix and i sound like a solicitior because they always beat around the bush
there is a button on your brake pedal lever that while braking gets
depressed, and turns on your brake lights. Now this component is a
plastic piece that can get knocked loose rather simply. You either need
to re-secure this component, or replace it
(you can get this part at any junk yard for nothing more than some pocket change)