Mk3 vrs TDI starting problem

Hello

I just finished rebuilding my engine because of high oil consumption. I changed

- piston rings

- con bearings

- conrod bolts

- head gasket + bolts

- head seal

- valve seals

- crank seals

- module bolts

- oil pump belt

- glow plugs

- injector copper seals and rubber o-ring

- all filters

- new oil

And other bits an pieces

I reinstalled the engine and bleed the fuel lines with VCDS and without the glowplugs I cranked the engine a few times so it would pickup oil and refill the block and head

Then I inserted the glowplugs and to my surprise it didn't start. I measured the compression and it was about 12-14 bar on all cylinders. I called my friend who is a mechanic (i'm an elecronics guy and a DIYer) and he told me that this is normal and I need to run the engine for the rings to set. Then the compression will rise. After alot of thinkering I left the car over night on a charger and the next morning it fired right up and ir ran for a few minutes. 

Then I gave it some gas to about 1500 rpm, when I let go of the pedal the rpms start to fluctuate at idle and it dies. I could not restart it. 

I cranked it for quite a while and no sputtering nothing I pulled out the injectors and they fire when cranking. I again bleed the lines and nothing. I again left it over night on a charger and the next day it fired right up and again it died. 

When it runs it runs normally. Today i'm leaving it without the charger to see what will happen tomorow. 

Does anyone have any advice on what to check

The only measurment I currently know is that the fuel pressure fluctiates between 380 and 440 bar when cranking and that the compression was 12-14 bar now after two runnings its at 16bar

The friend told me he had something similar on a ford. His porblem turned out to be the oil pump regulator. It was giving too much pressure and the tappets expanded too much and they kept the valves open. I cant test the pressure until I make a fitting on the pressure switch

The next thing I can think of is the crank position ring. I needed to change it with the seal i didn't have the special tool so I marked down everything and I am certian it is in the right position. I screwed it on with three bolts so its flat with the flywheel surface (i am planing to check the signal with a scope). 

One of the members here suggested the EGR system? 

Thank you

Edited 20 March, 20233 yr by TadyTheFish