So i just made a little video of what the problem really is. It's like the engine is misfiring on all cilinders !!
first i just start it , then you'll see the vacuum go lower and the revs drop and it starts running shit !
So i up the revs to about 2k and hold it till it improves , after that i let go of the throttle and i stays at 1.8k rpm to about 1.5k rpm.
The tappity sounds are my solid lifters , the phone picked it up really well
You have to turn up the volume big time though

Edit: It's with the cold start injector disconnected fyi, on the Co meter when it's running like this, the co is about 8% and lambda value about 0.778.