How To Repair Secondary Air Injection System On Audi A4

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• Project Time: 3 hours
• Tab: $375 to $600
• Talent
• Tools: 10mm wrench

• Parts Required: New auxiliary air pump, hoses
• Functioning Gain: Won't leave you stranded at the side of the road
• Complementary Modification: New V-belt

Emissions concerns have get a very of import part of modernistic cars.

Unlike in the cars of the past when very petty concern was paid to what came out of the tailpipe, modern cars have very strict restrictions on the emissions they tin produce. Manufacturers must produce cleaner burning cars along with trying to stretch every mile they can from a drop of gas.

I of the issues with the emissions systems on these cars is that everything must work in harmony for the cars to pass a SMOG test. If your car is having a difficult fourth dimension passing a examination, one of the issues may be the Auxiliary air pump.

The secondary or auxiliary air pump is role of the emission system and is used to inject fresh air behind the exhaust valves during the engine warm up. The filtered air is drawn in from the air box and pumped to the combi valve on the cylinder caput. The air produces an oxygen rich environment that assists in after burning and helps the engine run cleaner.

If you are having trouble passing a smog test, information technology may be the secondary or auxiliary air pump or system.

Hot tip

Careful working with the hoses, every bit they become brittle

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Project Photos

Figure 1 The air pump (red pointer) is located at the lower forepart correct of the engine between the oil filter and ability steering pump.

Figure ii There are ii hoses attached to the pump. The intake hose (yellow arrow) draws filtered air from the airbox. The outlet or force per unit area hose (blood-red arrow) sends air to the cheque valve past the cylinder head. To exam the pump, remove the pressure hose (scarlet pointer) on a warm engine and start the auto and allow it to idle. Later approximately 20 seconds, the air pump should run and yous should feel air coming from the outlet. Use caution when working with the hoses, as they become extremely brittle with age and are very expensive.

Figure 3 If the pump does not run, remove the electrical harness from the pump and check for voltage at the connection (cherry arrow). Starting time the motor and allow it to idle. You should get an electrical signal later on about 20 seconds. If y'all are not getting power at the harness, you want to check the fuse. If the fuse is good y'all will want to replace the relay.

Figure iv If the electric components are all good and the pump even so does not work, you probably need to supercede the pump. Begin past disconnecting the 2 hoses; squeeze the plastic clips (red arrows) and wiggle the hoses off the pump. Utilise care as the plastic hoses get brittle with heat and age.

Effigy 5 If you skipped the electrical connectedness test, y'all must now disconnect the electric connexion by releasing the tab on the connection and pulling information technology straight dorsum from the pump (scarlet arrow).

Figure six Apply a 10mm socket and remove the three 10mm bolts holding the pump in place (cerise arrows, two shown). Slide the pump out from the bracket.

Figure 7 With the pump removed from the vehicle, yous can meet the inlet opening (yellowish arrow), pressure opening (red arrow) and the condom isolating bolts (green arrows).

Figure 8 This photo illustrates that the intake hose (ruddy arrow) draws fresh air from the air box. The output hose connects to the metal pipage running to the combi-valve (yellow arrow). Use intendance when working with these hoses as they go very brittle. Installation is the opposite of removal.

Got more questions? Ask any of our automotive experts.

How To Repair Secondary Air Injection System On Audi A4,

Source: https://www.pelicanparts.com/techarticles/Audi_B6_A4/32-ENGINE-Auxiliary_Air_Pump_Replacement/32-ENGINE-Auxiliary_Air_Pump_Replacement.htm

Posted by: bakerlifuld1961.blogspot.com

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