Z3 Problem with tick over z3 1.9 4cylinder

Hi, I've recently had the intake manifold off to fit a new coolant flange and crank case vent. I've put it all back together and it's running rich and struggles when I rev the engine. I thought it could be the icv so I've bought and fit a new one but is till running rich. Could it be the mixture or somethin with the choke. Any help would be grateful.

imo go back over your work. you may have a vacuum leak

I'm gonna check over it tomorrow , I've been reluctant to because to check the intake manifold I Have to remove the fuel line. It's a pain in the ass! Still cheaper than takin it in to the garage

+1 on possible vaccuum leak.

Double check to make sure your fuel injectors are sitting in the manifold correctly. When I took mine off to clean the intake it idled really rough until I revved it up a few times. Did you change the lower manifold gasket and torque it to spec?

I've done all that and it's still running rich and becomes jittery every 60seconds for a few seconds. The spark plugs where black aswell so I've cleaned them up,

Any cracks in the 4 hoses going to the injectors?

I don't think so, the only hoses are breathers from the injectors, there's only the fuel rail and that's steel I think. I've replaced the breather hoses from the injectors. Would that have anything to do with it, I couldn't see it myself but I'm lost for ideas

Any way you can post a video?