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Hi, I just recently purchased a 2006 Audi A4 Quattro 2.0T. I got it for very cheap since it does not start and I enjoy fixing cars at home. My diagnosis so far is either the starter motor or the relay for the starter motor. The battery is extremely dead so I had to hook up a booster pack to try and turn it over. When I turn the key I can hear the fuel pump engage and the motor cranking over super slowly??? I have a pretty good knowledge of cars and working on them but I cannot seem to figure out this one! Hopefully you can help me diagnose the problem so I can go ahead and fix it!
The battery may have an internal short. This could cause an issue with the booster pack. Install a known good battery and fully charge it before furthering your diagnostic testing.
2006 Audi A4 Quattro 2.0 Starting system wiring diagram
What is the sensor that is in the middle top of the timing cover it broke off replacing timing chain now I need to get it out and replace it.
VTC oil control solenoid valve(A) location diagram.
VTC Oil Control Solenoid Valve Removal
- Disconnect the VTC oil control solenoid valve 2P connector (A).
- Remove the bolt (B) and the VTC oil control solenoid valve (C).
- Check the VTC oil control solenoid valve strainer for clogging. If the strainer is clogged, replace the VTC oil control solenoid valve.
Finally, note the amount of valve opening by observing the position of the piston shoulder (A) through the valve retard drain port. If you see the shoulder of the piston, the valve is open and must be replaced.