A while ago, a lot of you suggested I should fix my WRD as my car begun misfiring under acceleration and had hard starts. With some help from a friend, we tried replacing the WRD thermostat and it made the car fire up on first crank (woo!). However, since we did it on a mildly hot engine (the temp gauge read around 50 degrees celsius), a few minutes after it had fired up, the idle would lower quite rapidly until it'd stall. And it'd keep stalling until it cooled down a bit, then it'd fire up and stall a few moments later.
We had to throw in the old and broken thermostat to make it drive. Did take 4 long starting sessions before it even thought about firing on a few cylinders, but we got it running on the old thermostat.
I was told I had to adjust the WRD shut off point. I did check the old thermostat and it does not appear to move the pin out as much as the new thermostat (the old one is pretty stuck). My guess is that when the thermostat begins to heat up, it moves the pin out more than the old thermostat, causing fuel starvation as the pin moves the MFI rack too much.
Anyway, it seems like I have to adjust the shut off point on WRD so the new thermostat won't press the pin down too far into the MFI rack causing fuel starvation. Is it as simple as I've understood - a simple removal of washers down the tube that the pin goes into? From what I can see on pictures and drawings, the washers are just dropped down the tube which the pin from the thermostat slides into. I guess taking a small magnet down the tube and fishing them out could work, but is it really that simple to fix such issue? Are they not held down by anything but gravity?
And how many of the washers should I leave in there? I was told they had 2-3 washers installed from factory, so I guess I have to leave some in there.
The thermostat I replaced is the copper one called 'thermostat' in the following picture:
Thanks for reading, hope some of you can help me get my W108 back on the road!