1994 Suzuki Sidekick Q&A

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

I thought maybe miss fire but I did a complete tune up. but engine is still shaking. -
Answer 1
try doing a compression test to see if you have a bad cyl ,also check your fuel pressure -
Comment 1
how do I check fuel pressure and for vacume issues -
Answer 2
poss head gasket issue,did you overheat by any chance? -
Comment 1
no over heating. engine and timing strong seams like a vacume line but I cant tell -