Breaking up.....neeed help

[305racing]

my stock 89 7mgte is breaking up at 4lb boost....any ideas wat it might be?
mods= cold air intake
255 walbro.

 

[supraman74]

Check for trouble codes...
http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx

 

[jetjock]

4 psi is about where the fuel pump switches over. Assuming you haven't done the 12 volt mod try running it with the pump jumpered in the diag block. If it goes away bob's your uncle...

 

[305racing]

Ok guys i did the test and i got code 34.........does this mean i have a leak in my turdo system?