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2001 Audi A4 doesn’t start when engine is cold


dosent start at morng or when it stands for long

The next time you go to start the engine after vehicle has sat a while, turn the ignition switch on so the dash lights come on for two seconds, and then turn the ignition switch off.

Repeat this a half dozen times and then try starting the engine.

If the engine starts right up, it points to a problem with the anti drain-back valve on the fuel pump.


1 Like

thank yu so much but it look like is over fueling when you are starting whats cause that but wen it starts it is perfert

the car is also over fueling

What cause over fueling on audi a4 2001, ALT engine,2.0

If you have a leaking injector you could clear the excess fuel by holding the gas pedal to the floor while cranking.

In addition, a bad engine temp sensor can cause cold restart problems. It determines the temperature of the engine and tells the computer where to set the fuel ratio to start. Cheap but get the right one, not the one for the temp gauge.

How does motor warm up if it won’t start when cold? Hmm.

so where is it on audi i try to change that one for temp bt still doing the same bt when is hot it start quick