My Jetta swap MAF (image of another Jetta swap MAF):

http://tinyurl.com/nbqh2ob

is located lower than OEM (Jetta) position (image looking up at my
intake, MAF on RH):

http://tinyurl.com/kb9ufdg

so may be more prone to oil fouling than in the original Mk3
configuration. That said, I haven't noted any fouling issues and
usually clean it when I replace the air filter. David's comment below
makes me think that "yes", it burns off any oil during use. There is a
protective mesh on this MAF.

The Jetta engine management uses a wiper & resistive strip in the
throttle position sensor. It is similar in function to the WBX AFM
strip, but is smaller with only 3 wires (in manual transmission form).
It tests in a similar fashion to the AFM on a WBX but I have yet to
put an analogue meter on it to check for dropouts.

Neil.

On 7/5/14, David Beierl <dbeierl@attglobal.net> wrote:

>.....  The MAF has a cobweb platinum
> wire or some such strung across the airflow and
> is happiest squeaky clean (burns itself clean
> every time it starts, I think.  Very fragile and
> doesn't move, protected from debris by some sort
> of shield in front of it I imagine?).
>

--
Neil n

Blog: tubaneil.blogspot.ca

'88 Westy http://tinyurl.com/c8rlw6p

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG *Gas* inline-VR Engine Swap Group:

http://tinyurl.com/d7gd5ej