18 psi fuel cut

[99 gst spyder]

my dsm swap big 16g, fmic, full down pipe catback, hks BOV, hks intake so
when i wot at 18 psi, my dsm starts to do some kind of bog at high RPM feels like its not pushing any more, so i'm wondering if the cause is fuel cut or something else, and if it's the fuel that cuts, what is better for my fuel system and DO I HAVE TO GET ALL THE PARTS such as, F.I., F.P., F.P.R., F.R. AS THE WHOLE FUEL SYSTEM, or would it be something else.
plus i would like to get some use parts for my fuel system ### brand new is high.
thanks in advance

 

[marcmsj]

Fuel cut is usually very violent, it's like hitting a brick wall at high speeds and you're often left wondering if you broke anything.

If your fuel system is still stock, you shouldn't be trying to run 18psi, you're probably running too lean. I would at the very least invest in a fuel pump and a datalogging system system to see how lean you're running. Then you can take things from there.