Question about 1998 Volkswagen Jetta
Air pump is not coming on start up or any other time but pump is good computer says incorrect air flow i would quess it the egr valve or pump swich from dont know
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Posted on Jan 02, 2017
Double check the very small hose that comes off of the manifold, since it sits so close to the manifold, I would not be surprised to find it frail and broken.
If you have tried everything else, have you had the code cleared after you changed out the parts? try having it cleared again....
Posted on Aug 21, 2009
Hi, The EGR valve itself is on a set of flexible pipework - usually stainless steel - which runs between the inlet manifold and the exhaust manifold. The EGR actuator valve is pneumatically / vacuum operated by a solenoid valve, controlled by the ECU ( aka the brane). It's not usual for the EGR valve itself to fail, more likely the solenoid valve or its electrical connector getting dirty. If you google for VAG TDI N75 valve you should get all the info you could possibly ever need :-)
Hope this helps, D.
Posted on Jul 16, 2008
the air pump should start when car is cold, if you do not hear a small airplane under your hood, than it is not functioning, if you do, you'll need to do other diagnosis (checking vaccum lines most likely), but being such a new car, a dealer would probably be under warranty.
Posted on Jul 07, 2009
SOURCE: my check engine lite is
More than likely the secondary air injection motor has failed, this is the case most of the time, check all the hoses and verify the connection's and if u find nothing openly wrong replace the secondary air injection pump assembly.
Posted on Sep 03, 2010
the air pump is located on the engine towards the front of the vehicle and has apx. 3/4 diameter pipes running to and from it. it is apx. 2 fists in size and it is black plastic. one of the lines on top of the air pump runs to the other side of the engine towards the firewall. at the other end of that pipe is the valve. disconnect that pipe while the vehicle is running. no air out of the pipe means bad pump. air coming out of the pipe means bad valve
Posted on Feb 13, 2011
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