losing my mind over this engine....

[1SXY240]

I own a 1995 240sx se with a ka24de. It has an aem intake, obx header, full 3" exhaust, and s13 dual cam swap. The car also has a Walboro 255 fuel pump a 300zx TT fuel filter, and all emissions removed and has been running like that fine for a few months. But no i have a bunch of codes, the car is running extrememly rich, won't idle and the throttle response is horrible, when it does idle for the few seconds it does after I turn the car on, if I hit the gas, the car idle bogs then dies. If i don't touch the gas pedal and turn the car on, the car will idle for about 15 seconds, start jumping between 1000-250 or so then finally die.

The car is throwing a bunch of codes:

P0100 MAF or VAF A Circuit Malfunction
P0110 IAT Sensor Circuit Malfunction
P0115 Engine Coolant Temp. Malfunction
P0335 Crankshaft Position Sensor A Circuit Malfunction
P0505 Idle Control System Malfunction
P1400 EGR Valve Temp. Sensor
P1401 EGRC Solenoid Valve

ANY help or tips let me know please. I tried changing out the MAF sensor and the TPS with ones that DID work, and it changed nothing at all.

[jacobs13]

check for vacuum leaks

[JDMRIDDAZ]

Coolant temp sensor would throw codes as far as maf/cas etc..
Ru dumping fuel..or u got smoke cumming out of exhaust

[1SXY240]

no smoke but you can smell how rich it is and back fires are WAY louder than the usual little pops I get, they are as loud as when I ran open down pipe for like 2 days

[codyace]

255 is probably overpowering the stock FPR as well

Reset codes, and see what it throws.

[JDMRIDDAZ]

255 is probably overpowering the stock FPR as well

Reset codes, and see what it throws.
tru tru....
u need a adjustable fpr..for the 255lph

[1SXY240]

Thats what I was thinking also, I will looking into getting one asap, thanks.