1999 Audi A4 - Answered Questions & Fixed issues

Question edited for clarity and toss in some CPAS Question moved to model category. In the link https://www.google.com/search?q=1999+audi+a4+signal+flasher+relay+location ..

That is not true oil and water being mixed can come from many different places. Such as a bad radiator which would cause transmission oil to mix with the water also alot of audi's have a water cooled oil cooler which are a very common cause of oil being mixed with with water. These type of oil coolers are located under you oil filter. They have water lines hooked to them which cools the oil and when they go bad the water and oil will mix. So dont be convinced that its your head gaskets it could be but not as likely. You can pressure test your oil cooler to see if this is the problem just romove it an plug one off the inlet or with rubber plug which can be purchased at you local hardware store (I found mine at ace hardware in there specialty drawers where they have all there bolts) then attach a air hose to the other outlet pressureize the system and place it in a bucket of water. this should tell you if the oil cooler is bad but be careful not to ove3r pressureize the cooler this could damage it and caust it to leak. 15 to 30 psi should be plenty.

go to a dealer with vin and proof of ownership and have them cut you new keys --or search and see if any locksmiths have the authorization to do same

There are two fuses for the power windows, #22 for the rear windows and #23 for the front windows. They are 30amp fuses and are located on the bottom row of the 8-way relay carrier which is found in the footwell bottom left.

Audi fuses that are not in the cabin are located in the ECU box behind the fire wall.

Where is intake manifold valve location on Passat 98 not turbo and i need photo for manifold valve n156

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

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

I suggest you to do an ecm diagnostic to see if you have any codes stored. After that you can go from there, you might have an issue with the theft system. good luck.

Open remote clean contacts w/alcohol get the correct battery--or go back to the owner -bull

When was the last time you had the timing belt replaced? If it broke, you likely have internal damage. Hope it's something else, but this is a possibility since it had a belt and not a chain.

compression test check for internal crack in turbo replace plugs check for blown head gasket

What exactly are the symptoms is it just taking a lot to crank over and start? Is it starting and shutting right off you need to add more details

Sounds like you have either a shorted fuel pump driver ground or a sticking fuel injector or injectors. Remove the injector electrical plugs and see if it still flood if it does then then one or more injectors are defective, if not then the engine wiring harness is grounded to one or more injectors or the PCM (powertrain control module) is defective. Remove the spark plugs to ID which cylinder is defective, disable the ignition system when you do this or the gas squirting out the spark plug hole can ignite (been there)

You may have fuel coming out but do you have enough fuel pressure? Also have you checked to make sure you have spark?

Certainly. Get the Haynes Repair Manual on your vehicle from the local Auto Parts store and it will explain the steps in each service and identify any special tools that may be required.

Anti-Lock Braking System (ABS) Purpose Anti-lock brake systems (ABS) - generally also referred to as anti-lock systems (ALS) - are designed to prevent the vehicle wheels from locking as a result of the service brake being applied with too much force, especially on slippery road surfaces. The idea is to maintain cornering forces on braked wheels to ensure that the vehicle or vehicle combination retains its driving stability and manoeuvrability as far as physically possible. The available power transmission or grip between tyres and carriageway should also be utilised as far as possible to minimise the braking distance and maximise vehicle deceleration. Why ABS? Although today commercial vehicle brakes are designed to a very high technical standard, braking on slippery roads often results in potentially dangerous situations. During full or even partial braking on a slippery road it may no longer be possible to fully transfer the braking force onto the road due to the low coefficient of friction (friction coefficient (k)) between the tyres and the carriageway. The braking force is excessive and the wheels lock up. Locked wheels no longer provide any grip on the road and are almost incapable of transferring any cornering forces (steering and tracking forces). This often has dangerous consequences: - The vehicle becomes unsteerable - The vehicle breaks away in spite of countersteering, and starts to swerve. - The braking distance is significantly increased - Tractor-trailer combinations or semitrailer trains may break away or jackknife. Load sensing valve influence On dry roads today's load sensing valves (ALB) alone are often capable of preventing the wheels from locking if the vehicle is unladen; they also help the driver to effectively grade the braking process on wet road surfaces, but they are unable to prevent locking as such (no slip monitoring). In addition, they are unable to counteract any overreactions on the part of the driver, or any variances in frictional or adhesion coefficients which may apply to different sides of the vehicle, or indeed to its different axles (?-split road surfaces). Benefits of ABS: Only the Anti-Lock Brake System (ABS) - guarantees stable braking characteristics on all road surfaces. - maintains steerability and generally reduces the braking distance - prevents vehicle combinations from jackknifing - reduces tyre wear. Limits of ABS Although ABS is an effective safety device, it can not suspend the limits defined by driving physics. Even a vehicle fitted with ABS will become uncontrollable if driven too fast around a corner. So ABS is not a licence for a maladjusted style of driving or failure to observe the correct safety distance. 4 ABS Training Anti-Slip Regulation (ASR) Anti-Slip Regulation (ASR) Why ASR? Increasing the engine output (accelerating) on a slippery road surface can easily lead to the maximum adhesion on one or all powered wheels being exceeded causing them to spin, especially if the vehicle is unladen or partially laden. Spinning wheels when driving off or accelerating represent a safety risk just like locked wheel do when braking. Reasons - Wheels that spin transfer just as little cornering force as locked wheels. - They also no longer transfer any tractive power onto the road. Consequences - Vehicles that do not move or get stuck. - Vehicles that can no longer be steered, jackknife on uphill uphill gradients, or swerve in corners. Benefits of ASR ASR prevents the powered wheel from spinning and provides the following benefits: - Tractive power and cornering forces are maintained. - Stable driving behaviour is ensured when moving off, accelerating and negotiating corners on slippery roads. - The indicator lamp (if installed) is used to warn the driver of slippery road conditions. - Tyre wear is reduced to a minimum, and the motor vehicle's drive train protected - The risk of accidents is further reduced. ASR and ABS: ASR represents a worthwhile addition to an ABS-controlled braking system. All that is required to turn ABS control into full ABS/ASR control is an ECU with the additional ASR function and a few additional components for controlling the differential brake and the engine. This why ASR is only available in combination with ABS. Even a differential lock for off-road use and ASR do not exclude but complement each other. Limits of ASR The traction capacity of an all-wheel driven commercial vehicle can not be achieved by a motor vehicle with only one driving axle - not even with optimal ASR.

I do not understand what you mean. If the engine starts it is turning over. Turning over means the engine turns not that it starts. So the engine cranks but does not start? You need to check the crank position sensor. It should have 3 wires at the connector. 1 is power 12V, 1 is ground and the other is the square wave signal. with a volt meter make sure you have power at the wire closest to the curves side of the connector. Check resistence to ground on the wire closest to the square end of the connector. You cannot check the signal with out a lab scope or graphing multi meter. If power and ground are good you need a mechanic.

Get a Chilton/Haynes repair manual that covers this vehicle. It will, with pictures, show you where fuel filter is and how to change it.

The throttle body itself is just a casting and should not need to be replaced. The throttle within controls the amount of air going into the engine. It should not need to be replaced. The critical part that is sending information to the ecu (computer) is the Throttle possition indicator. if it has come up as an error code it could be bad contacts. Corrosion causes funny problems. Scrape the contacts to bright metal, reassemble check codes again. Still a problem replace the sensor.