 |
| AUDI A6 2.8 Engine |
This post
discusses a failure caused by a marked lack of power, especially at high engine
speeds or in the torque transmission phase, in 2.8 and 3.0 petrol engines of
the Audi and Volkswagen brands.
The engines motors affected are the following:
|
AMX PASSAT 3.0
engine. (Petrol).
AUDI A6 ACK
2.8 engine. (Petrol).
AUDI A4 ABC
2.8 engine. (Petrol).
|
SYMPTOM
The vehicle does not deliver adequate power and on the other hand, the
vehicle has poor torque delivery.
PROCEDURE AND SOLUTION
1- Full diagnosis without any results.
2- Some components
of the injection system are replaced but without a positive result.
3- The diagnostic
equipment does not recognize failures; even when parameters are read, all values are correct.
4- An activation of the components of the electronic
management system is performed and it is observed that the long manifold-short
manifold switching flap works properly, but despite the control valve of the
flaps is working, the failure still persists.
5- The valve is replaced but the problem persists.
Remedy:
This engine is equipped with a system of flaps that, depending on the
engine revs, switches from long manifold to short manifold in order to improve
the response at all engine operating regimes.
 |
| Engine intake air flow scheme |
These flaps are governed by a pneumatic valve that is, in turn, governed by
an electric solenoid controlled by the engine control unit.
 |
| Replaced vacuum tube |
In this case the whole system worked properly but the vacuum required to
operate the system did not reach the activation valve due to a leak in the tube
responsible for providing aspiration for the activation valve.
Thus the diagnostic equipment never reported a failure, as from the
electric viewpoint the system worked properly and the fuel injection ECU did
not detect any change in the electrical operation of its components.
Replacing the damaged tube section the problem is completely solved..
An fascinating discussion is worth comment. I do think that you ought to write read more about this topic, may possibly not certainly be a taboo subject but typically people are inadequate to communicate on such topics. centralina aggiuntiva alfa mito
ReplyDeleteNeeded to post you this bit of observation to say thanks a lot the moment again for the gorgeous opinions you have discussed here about Audi. I have no words to describe. Just Amazing. This is exactly what I needed, all the Articles I read are just too general. But this is perfect I love to read cars and cars are my top priority so I visited cash for cars toowoomba . that company is best in dealing with old cars and also provide car removal services too.
ReplyDelete