Hello all,
     I am having a peculiar problem with my audi 3A/ golf gti digifant
engine conversion. as stated it is an audi 2 liter running a golf RV engine
digifant fuel injection system, fuel rail and injectors.  Fuel pressure is
36 psi idle 42 under load . timing is set to stock golf setting(6 or 8*
btc?) This engine easily passed emissions , gets 24 mpg highway about 20
overall ,runs pretty good except for some hesitation at throttle tip in .The
afm is in the stock location about 2 feet from the throttle body. The
problem I am having is that occasionally during high humidity, rain or last
nights wet snow, the engine will not accelerate from idle a few minutes
after starting.It is like it is totally leaned out Almost like running a
cold carbureted engine with the choke off.  However if I unplug the coolant
temp sensor for the ecm the engine will run pretty much normally. This must
put the ecm into a default mode. After the humidity drops and the sky clears
, the problem vanishes,I reconnect the temp sensor, and the engine runs
fine. I've thought it was a"false air" problem but can not find an vacuum
leak after a careful search. I have also check the value of the temp sensor
at various temps and it is in spec.
I am leaning towards a bad AFM  , it is the only thing I can think of that
may be affected but humidity.
Can I install the AFM from the .2.1 wbx to test this ? Any thoughts  folks?
Thank you again,
Dennis Atkins