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2007 Audi A3 1.9 Questions & Answers
2007 A3 1.9l. My car turned off and won't start again
First off it's never a good idea to start an engine on brake cleaner so I would get it taken to a real mechanic shop. Second it could be alot of things from fuel pump to a mass air flow sensor. More than likely its a fuel issue. Check all fuses and If blown replace them with same size fuse. Check again to see if it starts if that doesn't work Check the rela for fuel pump you may be able to swap it out with another one in different location in panel see I it works. After this I it still won't start you need a scan tool. Good luck
Back wheel sqeaking and getting hot
The following asumes only one wheel is hot and the e-brake is not engaged or possibly hung up from having been left on while the car was not driven for a while. Up north, BMW (Audi ?) brake disks tend to start rusting after about a week of inactivity. For a hung up e-brake, it is sometimes necessary to go back and forth to break the corrosion.
A hot wheel usually indicates that the brake pad is dragging (i.e. the brake caliper piston is not returning into the brake caliper bore).
A couple of checks: measure the brake disk temperature with a temperature gun on both brake disks of the same axle. If one is much higher, the caliper piston is probably sticking. Can also check for relatively large temperature difference with your hand-just do not touch the metal or you will get burned. Look at the brake disk for evidence of the outline of the brake pad that may have transferred to it indicating a very hot brake disk. Chock the car well, put into neutral with e-brake off, jack up "hot wheel" side and try to spin the tire. If a lot of drag, sticking caliper piston. Caliper replacement or disassembly for a thorough cleaning will probably be required. If this is necessary, you should do both brake disks and pads and consider doing both calipers on that axle depending on age and corrosion condition.
2.0 FSI. What is causing it to cut out repeatedly?
If you have replaced 4 sensors the problem must be somewhere else in the system. Exactly which sensor is it as there are many sensors built into an engine and transmission? You could get a Good Auto electrician to check the vehicle to see if there is another cause of the problem.
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