[T2] ECU and larger displacement

[Sami Dakhlia]

Hi,

I'm back in California for the month, my annual pilgrimage to the US
to work on my '75 bus (and see family, too :)

I must admit that I'm just not enjoying the bus as much as I used to;
it's just a big headache. Too much time spent on fixing things, not
enough time spent traveling. Last year I installed a Dakota Digital
head temperature gauge and the temp readings went through the roof!

We suspected that the O-ring crimped on the thermo-couple didn't allow
for a proper seal of the sparkplug, allowing hot gases to escape and
cause the high temp readings. I've now relocated the sender, wedging
it between the fins, not under the sparkplug. Not perfect, but a
better solution will have to wait until the day I have to pull the
engine.

While the temp readings are no longer outrageous, they're still north
of what's acceptable, sometimes above 380 F. And the engine is lacking
power, even by vw bus standards.

Which brings me to a new hypothesis: the engine is running lean when
pushed to the limit (highway driving at 60mph, or climbing hills).
It's a '75 model and came stock with a 1.8 liter engine. I have since
"upgraded" to a 2 liter engine. I have so far assumed that the AFM
would properly compensate for the extra displacement, but now I'm
wondering.

BTW, I also adjusted the AFM following the instructions at
http://www.itinerant-air-cooled.com/viewtopic.php?f=50&t=7761&sid=26d79b8f4581a7c3219fbb1581ad5523

Thoughts?

Sami