Amskeptic wrote:It gets worse. Bentley claims you Canadians have series resistors like the older L-Jet buses, too. Do you?
Sorry, "series resistors" is a bit ambiguous. If you mean the current-limiting resistors in series with the injectors being external to the ECU and mounted to the firewall in a little aluminium box, then yes, just like the Federal models.
And how is this worse?
Amskeptic wrote:The full throttle enrichment switch kills the O2 sensor and provides enrichment only when the speed sensor declares that the engine is over 3,000 rpm. We can make it more complicated if you like . . .
This ain't fusion science. The 3000 RPM cutout is provided by the "OXS relay", which (on California models only) sits in series with the WOT switch and only closes the circuit when engine speed is over 3000 RPM. All the ECU sees is its full enrichment switch input closing. It neither knows nor cares if that closure is moderated by the OXS relay.
Amskeptic wrote:Never seen no bare metal pad.
I defer to your wider experience. After all, what is merely a hobby for me is a livelihood for you. But there has to be a difference in these that we could measure.
Those now-retired engineers at VW and Bosch would laugh at us monkeys here trying to figure out their coconuts.
"Hans, Hans, look at this . . . . can you believe it? Thousands of 'experts' opining away . . ."
"What? Where? HAHAHAHAHAHAHAHAHAHA"
I expect they would be astounded that anyone would even care to try and reverse engineer work they did 40 years ago. Well, any of them who are still alive and in possession of their faculties, anyways.
I think part of our challenge is in sorting out the incremental changes from year to year and region to region that blow up our carefully curated assumptions. Lessons learned from working on an '81 Vanagon don't necessarily carry over to a '75 bus, or even an '83 3/8 Vanagon (ie. just before the wasser). Just as lessons learned from working on type 1 engines and which are part of the widely treasured common lore don't automatically apply to the type 4 engine.