Audi a4 b6 fixing common vacuum leaks (2002-2008) pelican parts diy maintenance article electricity bill payment hyderabad


All modern cars use the vacuum created by the induction system and the motor to run various systems and components on the vehicle. The Audi A4 is not different in this regard and uses vacuum to assist in the EGR (exhaust gas recirculation) system as well as the intake system. The EGR is part of the efforts used to recirculate unburnt gases from the motor back into the combustion chamber to be burnt and result in a cleaner running engine. Vacuum is also used to control the amount of air entering the combustion chamber. This volume of air is carefully metered and the information is used to determine the amount of fuel added to the air and the timing of the spark to determine the maximum function from the engine; this will result in the best possible miles per gasoline while producing the least amount of harmful emissions.

Any sort of leak or unmetered air caused by a leaking, cracked or split hose, hose clamp or broken fitting can result in a poor running engine, failure to pass a SMOG test or a motor that will not run at all. Don’t forget to check places where vacuum leaks may not be as obvious, such as the oil filler cap and the dipstick.

This article will go over the location and fittings of the EGR, EVAP, ventilation and vacuum hoses on the motor. Each hose, fitting and clamp should be inspected. Hoses should be soft and pliable. Any dryness, rips, cracks or bulges in a hose means it is well past time to replace it.

Comments: Yes, looks like it comes up from the passenger fender well from canister then through the purge valve, Ys off one end across firewall to the manifold and the other down the side and under airbox. Pictures and videos on the net dont show enough but what i see is a rubber hose with a clamp continue off the bottom off the steel line and goes somewhere… The turbo inlet pipe maybe? Thanks.

Comments: Hello, I need help on finding out where one of the metal tubes that runs down the side of the airbox terminates to. Several mechanics stumped but throwing a code for it… The line im referring to is in picture 2 of this article and after the yellow arrow. And just dumping under the car not tied into anything. Id appreciate any input. Thank you!

Comments: I put petrol in my Diesel Audi Avant Estate A4 2003 1.9 and ran it , what a fool . All old fuel removed new fuel fillter lumpy running had injecters tested new injecter sills , but runs then job to restart so i have put it down to fuel injecter pump , what do you think??

Comments: Hi. Can you please tell me what the name of the hose is with the green arrow on my picture which I copied form your picture mine has split and the car now stutters when putting my foot down. I live in Asia and I can’t find a garage who will fit the part as Audi’s aren’t popular so I need to order it myself but have no idea of what it is called to be able to order it! Thanks in advance.

Comments: Hi…need help. i have an audi a4 b5 1.8 motor code ADR. Have problem with the emission and had error code 17916. Can you give me pcv/breather system diagram/chart for this type of motor. 1.8 ADR. Cant find in internet.thank you very much in advance.

Comments: Hi I’ve got a lot of black smoke coming from my exhaust it’s an Audi A4 2.0 tdi avant s-line I’ve changed the diesel filter the air filter and put injector cleaner in the diesel but it’s still smoking it’s sluggish until it hits 2000rpm then the power kicks in fine. Any help would be much appreciated thank you.

Comments: I have a 2008 Audi A4 2.0 i need to know what this vacuum connection is coming from the master cylinder to the piece that i need to know the name of then another vacuum line comes off of that then goes to the back of the motor. Thanks

Comments: Hi, I am having a problem with a minor engine surge on a 2.4ltr A4. only under load and between 1000 and 2000 RPM. i noticed while looking for air/vac leaks that a linkage is damaged at the front of the engine, what is this and any suggestions?

Followup from the Pelican Staff: That is the control linkage for the variable intake flap. I would start by repairing it. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.

Looks like I need a new hose and wondered if you recognised this? It’s the small braided hose that you can see in the photo through the manifold. The one that forks to the right with a silver collar. The other end is not attached to anything at the moment! Any help identifying what it is and what it does or is supposed to do would be greatly appreciated. Thanks a lot.

Comments: Hi Guys, where does the front vacuum hose on the intake manifold connect to? I have just had the rocker gasket replaced and the mechanic has left the hose off. He couldn’t find where it connected to from the manifold! My car is a A4 1.8TQ B5 1997. Has 105,000 klms on it.