My a4 Audi 1998 does not want to start engines has just been done, it started just once and went dead again what could be the problem?
If it will crank over, it can be started. Only IF it is getting fire to the plugs AND fuel to the cylinders. What you can do is, have a spark plug wrench ready to remove the easiest to get to spark plug, crank ti over a few times like you'r trying to start it, shut the switch off and pull the spark plug quickly. IF the tip of the plug at the electrode is wet, it's getting fuel to start. Fuel delivery is fine. Now, before you put the spark plug back in the head, put the plug on the end of it's consecutive plug wire end, hold the electrode on the engine to ground it and have someone crank the engine over. If you see a spark happen at the electrode, your getting fire also. But for it to NOT start, one of the two have to be missing. If both are present, and still no start, then, it could be that the cold start mode from the computer is not engaging and not enough fuel to the cylinders. To check that, remove the wire plugged onto the temperature sensor and ground it to the block. Crank the engine and see will it start. If it does, you have a faulty temperature sending unit/sensor. You've now tried as much as would be any required start procedure and it should be running.
1998 Audi A4
on Feb 05, 2019