Audi A6 3.2i V6 24V FSI AUK - Loss of ignition on the 5 cylinder.

Question

Hello, after starting the engine feel clearly uneven work on gasoline and gas. Ignition loss error on cylinder 5. There is nothing disturbing from the exhaust, the exhaust does not smell, the engine burns to the touch, the coil is replaced, candles, compression on each of 10bar. In the preview...

sulof1601 · Answer

Hello. Perhaps something in the gas controller is going on, e.g. a cold February, because now the petrol and gas injection signals flow through it.

kubas10 · Answer

This might be a good idea.

Michal2002 · Answer

Problem with valves?

kubas10 · Answer

It is the same on a cold and hot engine, but the compression increase on the 5 cylinder and on the other is the same. The car is 200,000, but I don't know how many times it has run on gas.

Added after 4 [hours] 43 [minutes]:

Timing done less than a year ago, after adding gas (on gasoline) a small cloud of black smoke went, after adding gas (on gas) it is gone. It seems that the 5 cylinder does not burn, too much fuel? candle dark, others light. Damaged injector that pours, but why does it work poorly on gas?

Michal2002 · Answer

Buddy valves or camshaft?

DoctorCar · Answer

I don't remember exactly this engine, but the drive chains of the suction rollers through variable phases can be a problem here (tensioner-chain)

kubas10 · Answer

What can be with the valves? --- >>> as I wrote earlier, the compression is ok and the way it increases also seems to be ok, as for the camshaft, I did not disassemble the valve cover (you would hear a clicking sound) but I will check in on Monday. As for timing, it is apparently under warranty because it has not been a year, it was replaced because it was noisy, but after starting the engine it is quiet. As for the variable timing phase, in the idling parameters as I added gas, the right side of the cylinders changed the setting and the left (5 cylinder) nothing worked. The question is whether it should be idle or not because of this failure ???

sulof1601 · Answer

And the valves or the variable timing phases only apply to the fifth cylinder or do you have more on this side? If there was a problem you would have other errors instead of just falling out on the fifth cylinder.

kubas10 · Answer

As I cleared up the errors and drove about 3 km, after connecting there were no fault codes and the engine controller practically did not see the ignition loss on the 5 cylinder, the parameters appeared only once, and the engine worked not evenly all the time.

Michal2002 · Answer

Maybe swap coils? Possible driver?

kubas10 · Answer

Coils went to the first fire, the driver has no way to replace. Added after 12 [hours] 9 [minutes]: After removing the suction manifold, the suction valves cannot be seen.

Michal2002 · Answer

Maybe to clean the intake?

kubas10 · Answer

My friend sympathetic Michal2002, I find out why this polemic?

Michal2002 · Answer

Buddy, I thought I would do well, if not sorry. Maybe something missed me or I didn't read something. From what I remember, FSI like to have a dirty intake.

kubas10 · Answer

Returning to the topic, it seems to me that the problem of uneven operation is a clogged intake, I also translated the injection in places, i.e. from the left head to the right and the problem is too little air in the engine. Rest OK.

Audi A6 3.2i V6 24V FSI AUK - Loss of ignition on the 5 cylinder.

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