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: 7/19/2007 Subject: Fast idle with 78 vw type 2
Question Hi Ron,
I have a 1978 type 2 volkswagen bus, manual, with fuel injection. My idle speed is high--about 1200 rpms. I have the bypass screw turned in all the way and that's as low as it gets. It should be about 850 rpms. Anyway, I've checked for vacuum leaks and didn't find anything. I used a vacuum gauge and got a good reading. I've checked everything in the fuel injection system: the auxiliary air regulator, decel valve, fuel pressure regulator, injectors, cold start valve, temperature sensor 2. I replaced temp. sensor 2 and fuel pressure regulator. Also replaced most vacuum hoses and injecor seals and air intake runner gaskets. Did electrical tests on all parts of fuel injection, everything was good. Found out that the ecu was not the right one--it was for a 75 bus, so I replaced it with a used one for a 78, but it didn't make much of a difference, if any.
I was wondering if weak springs in the distributor could cause a fast idle. I did mess around with the distributor a while ago and took it apart out of curiousity. Didn't know at the time that the stuff inside is sensitive. What do you think?
I'd appreciated any help. Sorry for the long message.
Thanks,
Eddie
Answer Eddie,
Well put description. This leads me to believe that the distributor is having a problem or the timing is too far advanced, which can cause a dangerous overheating situation.
Check your service manual for the correct timing, loosen the distributor and check it with a timing gun or statically time it.
