why does my engine shake and I hav slight loss of power on 1994 Suzuki Sidekick

I thought maybe miss fire but I did a complete tune up. but engine is still shaking.

Asked by for the 1994 Suzuki Sidekick
poss head gasket issue,did you overheat by any chance?
no over heating. engine and timing strong seams like a vacume line but I cant tell
1 more answer , 1 more comment
try doing a compression test to see if you have a bad cyl ,also check your fuel pressure
how do I check fuel pressure and for vacume issues