20 Most Recent 1998 Audi A4 Questions & Answers

The serpentine belt routing diagram for 1998 Audi A4 Quattro 2.8 liters V6 engine:



CS = Crankshaft
F = Fan pulley
Gen = Alternator
T = Tensioner pulley
AC = Air Conditioning
PAS = Power Assisted Steering

Schwaben makes a great 3-piece pry bar and cam seal removal tool. I have found many uses for mine. https://www.pelicanparts.com/More_Info/PELPB3PCS.htm?pn=PEL-PB-3PCS&gclid=EAIaIQobChMIjs2nvI2h4gIVHLjACh1-ggjyEAQYASABEgIUQvD_BwE

http://www.sjmautotechnik.com/trouble_shooting/radiocode.html

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.

Check this website you find there fuse box diagram and description for Audi A4 A4 CARKNOWLEDGE

I tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my ford explorer. it wont move forward or reverse, engine is good both solenoids for forward and reverse work. I don't have much technical knowledge but I just followed it step-wise, and works perfect! got it from www.reliable-store.com

Hi You may have to replace the system pressure cap. Also check to see if the system is under pressure soon after starting the engine if it is it could be Head Gasket, my money is on the anti-free reacting with the rad cap (for your sake), have a look at the over flow hose to see if the end is whet after a short drive. Let me know how you get on and any more info that would help me this end. Regards David

The brown wire from the downstream sensors is broken or otherwise not connected to the computer. Check for damage to the wire.

Was the brake line removed ? There is no reason a brake line needs to be replaced unless the line was broken or damaged. One way to check if your car has sensors, is to look for a harness that runs and is secured on the strut. Also check the hub, there is usually a slot in the back where the sensor is mounted. Some vehicles come without brake sensors, best thing to do is call local dealer, supply them with your VIN and ask them if it comes with sensors. What were the repairs done to your brakes ? What is the problem after the repair was done ? You may only need to bleed the complete system if calipers were replaced.

Is this a diesel?

You checked the fuel pump for power and verified there is no power to the pump? Remember the pump only runs for about 1 second unless the engine starts.