need help

[stokeless2]

My car doesn't seem to be running right. Here are my list of mods:
full exhaust elbow back
hks metal gasket
walbro 255
rc 550 cc
aeromotive fpr
act clutch
spearco ic :umno:
hks to4e kit
lex afm
car runs okay at low rpms but once I get up there it starts to struggle. I mean like slowing getting to high rpm range. Think I'm running too rich? Low boost or high it makes no difference. Also my coolant keeps on overflowing. Any ideas what it could be.

 

[americanjebus]

exhaust in your coolant lines pushing it out?
do a check on everything you can, fluids, exhaust color/smell or oddball noises.

 

[MKIIINA]

maybe a boost leak for the running rich and lack of power. for the pushing coolant out... can only be a few things, BHG being one of them....

 

[stokeless2]

Well do you think it could be the disphram on the wastegate. It's supposed to have a 14lb spring but I only get about 6 or 7 lbs of boost. I'll double check on the boost leak. I don't think I have a blown hg. I checked for coolant in oil etc. Everything seems good. I have a greddy metal hg. But it doesn't hurt to check everything again. I'll see what comes up. Thanks