My car; 1998 audi A6 quattro 2.8 won't start. Some checked and told me its my key that expired. I started observing that sometimes after a drive, when i park the car it won't start when i attempt to re-start, sometimes after several attempts the car would start. It continued this way for months until it won't start anymore. I need help my car is parked for over 3 months now.

SOURCE: Audi A6 Misfires

You may have a coil pack going bad. They're on the front top of the engine - you'll see them if you follow the spark plug wires back. Do you have any codes from having the engine scanned? If you can get it scanned (AutoZone will do it free), post the codes up and we'll see which cylinder(s) are misfiring. From there, you can swap coilpacks around and see whether the misfires follow the packs or stay in the original cylinders. If they move, you have a bad coil pack or two. If they don't, since you've already changed plugs and wires, I'd see about having the injectors diagnosed to see if any of them are failing.

Marvin

• 85242 Answers
• Posted on Oct 13, 2008

SOURCE: Oil questions for 2003 Audi A6 Quattro

oil type is either 5W-30W or 10W-30W depending how cold your climate is, as far as having the car properly taken care of, the Audi dealer is the best option, they have all the proper tools and service info needed to keep the car in top running condition.

SOURCE: Audi Quattro A6 will not go into drive

It's the brake pedal switch. There is a switch down on the pedal arm that closes when you press the pedal down, and sends a sensing voltage to the controller, telling it the brakes are applied. This allows the transmission lock to disengage so you can shift out of Park. When that switch fails, the lock won't disengage. You need to replace that switch and you'll be fixed.

SOURCE: thermostat audi a6

look under car on water pump housing, the thermostat is on a metal housing that looks like an igloo and has to bolts perhaps 10mm or 13mm, and an "O" ring in between

SOURCE: Car only starts after several attempts with the ignition.

HI,IS THERE A ORANGE LIGHT FLASHING ON THE CLUSTER WITH A KEY IN IT,IF THERE IS THEN THE SIGNAL FROM YOUR KEY IS NOT GETTING TO THE IMMOBILIZER.THE FAULT WILL MOST LIKELY ATR THE PLUG ON THE READER COIL,IF THAT IS NOT THE CASE AND THE CARS ENGINE JUST AWINGS AND WILL NOT FIRE I SUGGEST YOU REPLACE THE MAIN RELAY NEXT TO THE ENGINE CONTROL UNIT PLEASE LET ME KNOW,ANDY