Hi Alex.
Nice to see younger owners coming into the fold, give it a good service replacing the PCV filter which does get over looked.
Check those plenums
link below.
https://the75andztclub.co.uk/forum/s...d.php?t=125864
get the manifold off and cleaned out, along with the EGR, and wipe the MAP clean all these jobs will see the car running good for you.