audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Checking EGR temperature sensor -G98 > < Checking EGR valve -N18
MPI fuel injection and ignition system
Checking EGR
Checking mechanical EGR valve

Special tools, testers and auxiliary items required

 
W00-0515
  • ◆ V.A.G 1390

Test requirements:

  • ● No leaks in vacuum pipes and intake manifold connections
  • ● Vacuum pipes not clogged or kinked.
  • ● Engine oil temperature at least 50°C.

Test sequence

  • ‒ Start engine and run at idling speed.
  • ‒ Pull vacuum hose off mechanical EGR valve.
 
A24-0023
  • ‒ → Connect hand vacuum pump V.A.G 1390 to valve.
  • ‒ Operate pump.
    • ‒ There should be a noticeable impairment of idling speed behaviour

If this is not the case:

  • ‒ Cehck pipes and connections for clogging; if necessary, renew mechanical EGR valve.

Checking EGR temperature sensor -G98 > < Checking EGR valve -N18