Shuddering issue

Hello everyone! I'm new to this forum so i apologize if my newbie shows. I have a 2000 Jetta TDI & ive done the repairs on it myself. I've recently done an oil change, AC delete, new battery, new glow plugs, & fuel pump. She's doing this thing where if she sits at an idle or you're coming to a stop, it feels like its shuddering. If i'm at a stop itll feel like she's going to die but then will even itself out then start again. I'm new to diesels in general & have no idea what this means. Does any one have any idea or have dealt with this before? any help would be greatly appreciated!

Is it a manual transmission? May be a dual mass flywheel on its way out. Another thing it could be is slow down shudder but it usually stops when you come to a stop.

It is a manual. What would be a good way to test to see if the mass flywheel is going out?

Go to post #20 on the thread two down from you about vibration through the clutch pedal

The shuddering as you come to a stop is all but normal on these cars. If it's bad, you can adjust IQ or look for other things like failing DMF, dirty filters, etc.
My first TDI (99.5) had the shudder but never stalled, don't notice it hardly at all on my '03.

Id check for small fuel leaks at fuel filter, leak off injector pipes the rubber ones. Id a similar problem turned out to be the leak off pipes one had the slightest tear in it.

check the site for 'slow down shutter' , you probably need to adjust the Injection Quality.