2000 Jetta VR6 2.8L. secondary air injection pump problems

Joined
Aug 27, 2020
Messages
1
Points
1
Make
VW
Model
Jetta
Year
2000
Miles
180,000
Engine
2.8L VR6
Need help with secondary air injection pump problems, car is misfiring and has lost a lot of power. Any fuse, relay locations, diagrams, etc. Any help would be great.
 

billr

wrench
Staff member
Joined
Mar 12, 2007
Messages
6,879
Points
48
Any codes set?
 

NickD

wrench
Joined
Aug 28, 2007
Messages
5,149
Points
48
Had a 1973 Caddy Fleetwood intended for California, but got lost in Wisconsin with a secondary air pump, this pumped air into the catalytic converter to assure combustion of unburnt fuel.

Anything that injects air into the engine is a supercharger or a turbine. Common cause of a misfire is water in the gas, spark plug not firing, or a plugged fuel injector. Worse case is an intake or exhaust valve not closing, like to do compression test first, saves a lot of wasted time. And is very possible with 180K miles on a vehicle.

Use to be real easy on a 70's V-8 engine with overhead valves, you have two heads with overhead cams, that is a lot of stuff to remove but see you have a timing chain and not a belt. Could use spockets to take up the play, yours uses friction arm that wear.

Another engine wrecker is paying for E10 and getting E1 or E2, low octane fuel combusts when the piston by vehicle inertia is going up. E10 is NOT a homogeneous fuel and by all means, should be outlawed, but have crooks running this country.
 

grcauto

Hero Member
Joined
May 29, 2014
Messages
724
Points
28
This is for the AAA engine. The AFP only uses the VAG tool to troubleshoot this system Glean what you can from the flow chart and use the wiring diagrams to do your testing.

wire.JPG

wire2.JPG

wire3.JPG
 
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