Near Stock R33 Not Boostin Well At High Rpm

[turbo power]

i got an 1994 r33 gtst. rb25det

mods

- 3 in exhaust

- fmic

- blitz dsbc

- bov

- pod

anyways if i turn up the boost more than 9psi when it comes on boost, it will pull hard til after 4000 rpm then suddenly go gutless 4 a split second then boot hard again. This happens every about 700-1000 rpm thereafter til red line. could it be a worn fuel pump...

any suggestions plz

[ODessA]

i got that too when i put my front mount and ebc on my 32, anything over 12.5psi would do that, i just assumed it was the fuel pump not keeping up, havent got around to replacing the pump with a better one so just put the boost back down, but yeah hopefully thats the prob.

[SAMFISHER]

Coils/Sparkplug's issue?

[nsta]

i had a similar issue, gapped my sparkies down a fair bit and ive never hit a problem since, i have got it in the past when giving it a flat foot when cold !

[Munna]

Your ECU is richening you air fuel rato's common problem with skylines. Get a SAFC or better still Power FC. I used to have the same problem SAFC fixed it.