Len, thank you for the offer. I might be interested in a pressure gauge - do you have it in BAR?
Here, due to lack of aftermarket options locally and wanting to fix it asap, to calmly put it in winter storage, went with OEM parts. Shop replaced the regulator and damper and the fuel pressure went to spec - 2 BAR at idle and 2.7 BAR with vacuum disconnected.
However, now we bumped into another wall - with fuel pressure now correct, engine starts easily, but seems to be running overly rich, unevenly and fuel smell from exhaust is felt immediately. Mechanics made a little test drive, power is not consistent, and it becomes undriveable when warmed up.
I didn't like them making test drives in this condition, also their approach to start throwing parts at everything and see what sticks, and tear it all apart while without making all the necessary checks of sensors beforehand. Therefore, I parted with them.
Now I will be having the car at home for coming several months before I will get it to the (distant) aircooled 911 specialist who built the engine. I kinda wanted to bring the car to him for a checkup after a engine rebuild, so now it will make more sense.
Now, I have an opportunity to test by swapping a known good DME, but from a 1984 US model. Everywhere I looked, says, that they are compatible. Right.. right?
Can anyone confirm? Or should I dig more? Here a the pictures for actual units: own, left, 1986 / borrowed, right, 1984.
What else can I easily check when the car is with me? I came upon a
very extensive and very well documented diagnostic process in another thread I will replicate some tests of, but maybe there is something I could be directed to from the data we have now?
Would love to get out this issue of the back of my head for holiday season
EDIT: litereally, after making this post, and seeing both pictures next to each other, notices that one the ECU repair companys label, field ECU is the part # and it's the same, so I'm pretty sure they will be compatible..