AboutRon Wolff Expertise I am proficient in the following areas of VW Air Cooled Models from 1968-1979:
Vehicles: Super Beetle, Beetle, Thing, Karmann Ghia, Bus, Westfalia/Bus
Areas of expertise years 1968-1979
Engine Rebuild advice for all air cooled engines
VW Brake system replacement
Automatic Stickshift transmission
VW KOOL and DPD air conditioning systems (ex. thing)
Westfalia Electrical system dual battery
Westy Refridge Repair
Westy Cabinet Repair
Westy
AFC Fuel Injection system (1975 bugs) (1975 bus/Westys)
Soundproofing
General type 4 engine rebuild/technical data (i.e. 1.7 ltr, 1.8., 2.0) for buses
VW Air Cooled Beetle and Bus Paint codes
VW Distributor Compatibility Information
Westy component repair
Emission Systems
Exhaust Systems
General Electric System
Door rebuild (windows, seals, vent windows)
Body Panel Removal and general repair (non-welded)
Charging System
Convertible top Installation: Beetle
CV joints
Engine Troubleshooting
Valve Train
Non areas of expertise:
High Performance Modifications
Front end related components
Rear suspension (spring plate adjustment)
Bodywork / painting
Experience
Past/Present clients I often contribute to the westfalia users group technical boards. I have been a member for about 4 years. My usermame is 76Heatwagen
I restore vintage Volkswagens and currently own 4 of them.
Expert: Ron Wolff Date: 12/28/2007 Subject: 1999 VW Eurovan
Question I have the error code P0411 (secondary air injection system is incorrect.) I have the VR6 motor. Any clues on how I can trouble shoot this?
Answer Hey Mark,
The secondary air injection system is an air pump that injects air
into the exhaust when you start the engine cold in order to more quickly warm your cat. converter and reduce
hydrocarbons out the exhaust when the engine is cold.
It consists of the pump itself (about $400.00), vacuum lines, and a combination valve that shuts it off..aka combi-valve.
The best thing to do is to check all of the vacuum lines (near the brass ones too) -- they tend to crack and is most likely your cause.
Otherwise, you will need to get a Robert Bentley guide to troubleshoot the combi-valve.
The worst case scenario is the pump itself, but as a rule, they are pretty sturdy.
