I must have got lucky. My S4 n/a has 202,xxx miles and I believe the comp was at least 85 psi last time I did a test and it starts in under 3 seconds any time.
It was alot worse when I got it though, but I did alot of work to it:
- Injectors cleaned and flow tested
- All new intake and exhaust manifold gaskets
- New injector plugs (mine were all janky beyond repair)
- Emissions removal (cats, rat's nest, air pump, EGR)
I think having the injectors cleaned will help alot with the flooding. I used Witch Hunter Performance, A+ service.