leaning out on boost.....wasn't before

[12sectsi]

quick list of mods so someone can put it together and help: Thermal 3" Cat-Back Exhaust
Random Technology 2.5" High Flow Cat
Pruven Performance 2.5" Downpipe
Extreme DIS Intake
Extreme XBC Boost Controller
Small ported 16G Turbo
Ported O2 housing
Ported 95 Manifold
GReddy Type-S BOV
GReddy Front Mount Intercooler
Lucas 550cc Injectors
Walbro In Tank Fuel Pump
RRE UIC Pipe
Magnecore 8.5mm Wires
NGK BPR7ES Spark Plugs

****take in mind that the car probably needs plugs and wires, and I just had the timing belt done. HERS MY Prob! after the local car care shop fixed my water pump and did the timing belt, the car runs like shit now. under boost the car burries itself into lean hard core, so i have been driving it like a bi***. could someone have messed with my SAF-C settings, or what? i need to fix this and want to tune the car back to max performance. what would be the settings on the saf-c for this and what else could it be? bad o2 sensors? timing? i'm shooting into the dark. please help.

 

[laza101]

FIrst of all, check your AFC settings. Secondly, check to make sure your fuel pressure regulator is hooked up to the pressure/vacuum hose from the intake manifold/solenoid and check that the solenoid is plugged in. If they disconnected that line then you wouldn't get any fuel compensation under boost. How does the car drive around town?

 

[eclipse93b]

sorry to hijack the thread, but... i have the same problem. I have been driving around and boost was just fine, and it pulled hard. and the 02s were in the rich just like normal. and now around town driving is fine 02s are perfect, and then when i get on the boost at all it leans out like hella, and when i WOT it it feels hesitant alot. could this be the ECU? I have a TMO ecu and its kinda been acting up alittle lately. like just 5 days ago when i start the car all the lights on the cluster turn off like normal then 3 days ago all the lights go off except the battery/coolant/ebrake lights stay on like half way, then when i give it gas the warning lights go off slowly, but if i let the car idle again the lights will come back, and when i boost it they go away and stay away. and know that problem is gone, but when i boost the 02s get really lean now, like as in not on the meter anymore even.

what could this be? fuel pump? ecu? [i have an extra turbo 5speed ecu, i should give that a try] what else could it be? ill check the timing tommorrow and update. Any help would be appreciated.

 

[Mike 99GSX]

Do you trust the shop's work? It could be that they didn't get your timing marks quite right.