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Audi Repair Questions and Answers
Question: 2001
A4 Quattro V6 30V mileage: 100,000.
I am hearing a kind of humming noise coming from the back of the car sometimes.
After a while it gets really bad and the car starts to slow way down and you have
to push the gas pedal all the way to the floor and the car stumbles for a while
and then it starts running all right. It seems like the fuel filter might
be plugged up and if that is right, could you tell me where it is at.
Answer: Your stalling problem
may be cause by the fuel pump. Replacing it and the fuel filter should fix
your problem. The fuel filter should be located in the back by the gas tank.
Question: 2000 A6 Quattro V8 4.2L mileage: 90,000. My car will
be driving normally then a sudden increase in temperature occurs then overheating.
I wonder whether the thermostat is stuck in the closed position. I have just started
to use the heat. That’s working ok.
Answer: From what you describe, one of three things are at fault. 1.
A stuck thermostat, 2. A radiator cooling fan not operating properly, 3. A partially
plugged radiator.
Question:
1999 Audi A4 2.3L mileage: 143,900 It doesn't have an owner's manual and
everything is in German. After I got it home and it sat for a day, I it started
it and the battery light and engine temperature light stays on after ignition. The
strange thing is the two lights get brighter only when I'm accelerating. When I
shift gears the lights would fade until I put my foot back onto the gas pedal. I've
checked the battery, it's almost like new, and the engine doesn't seem to be overheating.
I thought it may be the alternator, but even that looks good. Someone who also owns
an Audi suggested that it may be the relay, but for the life of me, I can't find
where the relays are. I would take it to a repair shop but here in Prague they charge
you an arm and leg just to look at the vehicle, let alone fix it, besides, it's
a standard and I need both arms and legs to drive it. Can you guys point me some
sort of direction of what to look for or what to ask for.
Answer: First, we would test the alternator and make sure that
it is putting out 14 to 14½ volts. If the voltage output is okay, we would still
suspect the alternator because a diode that is failing will cause the battery light
to come on even though the charging is okay.
Question: 1998 Audi A6 mileage:
99,000. When I start the car in the morning or afternoon after work, the engine
idles very rough for a few seconds before going to normal. Sometimes the RPM
will fluctuate from very high to very low after starting. Sometimes when switching
gears (5 speed manual) the RPM remains high and doesn't drop when easing off the
gas. After driving for a length of time (about 45 minutes) and I stop for
about 5 minutes the car will not start until after about 30 minutes, and will continue
to run erratic. I took it to the Audi deal here in Saudi Arabia and they said
they replaced the air filter, regulator (part no. VW034 133 482) and adjusted
output idling, but after about a week it was back doing the same thing. I
would appreciate any advice as to what might be the problem.
Answer: Scan the computer for
fault codes. Also, replace the oxygen and coolant sensors.
Question: 1997 Audi A6 mileage:
122,000. Lately the heater fan has been making odd sounds at regular and low
fan speed. High speed is ok. Tonight, I turned the car off to run in
to the coffee shop. (Note: the heater fan was making that loud noise.)
When I started the car up, I had no headlights, signal lights, and the climate control.
(No heat) also no seat warmer. The car ran ok. Parking lights
and instrument panel are fine. I checked the fuses and alls well.
What could be the problem?
Answer: We are guessing
that the fan motor shorted out causing a fuseable link to fail.
Question: 1996 Audi A4 mileage: 125,000 My car has a cold
start problem will not idle until started at least 3 times & will not idle below
1200 rpms after warm. What could cause this? It is fuel injected not carbureted.
Answer: Your car may be ready for a major tune-up including spark plugs,
plug wires, distributor cap, rotor, fuel filter and air filter. Also, perform a
fuel pump pressure test. Clean fuel injection system including throttle bore, idle
speed control motor and passages. If problem still exists, scan computer for trouble
codes.
Question: 1998 Audi A4 mileage: 132,000. I just replaced the external
fuel filter and ever since only when it is cold it has a hard time staying running
until it warms up after 10-15 minutes. Once it is warmed up, it runs great. Someone
mentioned a cold enrichment valve. I am not sure what that is.
Answer: The cold enrichment valve is only active during cranking when
the engine is cold. Check electrical connector in the engine compartment. One may
have been "bumped" while the fuel filter was changed. Pay extra attention to the
temperature sensors.
Question: I have a 1999 Audi A4. Maintenance
is included and calls for an oil change every 7500 miles. Doesn't that seem like
to long to go for an oil change? If I wanted to change it more frequently, I need
a special wrench to take the oil plug off. Do you know what kind or size of wrench
it requires?
Answer: 7,500 miles seems a little too long. We recommend
3,000 to 4,000 mile intervals. If a special wrench is required, you should be able
to purchase it from your Audi dealer.
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