New to all this. 99 ls1 upgrades need more help

[RkgLS1]

I have a 1999 ls1. Was all stock.
Swapped into a 1987 camaro. Had some pcm changes 10 years ago. Shut off VATs, post Os, EGR other small stuff.
I put on a bigger intake (generic high rise) 102mm throttle body, 54lb injectors and swapped a MAF (card style 12576410) I got the IAT figured out and adjusted. No MAF reading on scanner and it over fuels and stall the engine e out.
Can someone tell me just how bad I messed up.
I shut coded p0101 p0102 p0103 off and still over fuels.
Thanks

[gametech]

My psychic is off work this weekend, so I have no idea what your tune or log files look like.

[bk2life]

Can someone tell me just how bad I messed up.

you didnt post your tune nor your log, how can we see anything?


The following list really helps us, help you:

Vehicle make/model/year
Tune AND data log
Engine/size
Axle gear ratio / tire size
Computer and operating system used
Type of heads (317/243)
Transmission
Torque convertor stall
intake manifold
Intake tube / air filter
MAP part number
MAF part number
Injector part number
cam used (link to specs)
exhaust type (long tube headers, no cats, straight piped)
pictures of engine
pistons
compression
throttle body type, size and DBW/DBC
Fuel pressure at idle and while driving
fuel system type, FPR, pump size, returnless or no
ect ect

[RkgLS1]

first thing is I want to thank you to anyone being helpful.
this is just a fun cheep build to start with.

I will try and get a data log tomorrow.

motor and trans are out of a stock 1999 pontiac firebird 5.7 LS1 stock rotating assembly
2g2fv22g2x2203616
hardware p01 gm gen3 v8 4.3 v6
S\N 1dg01em28252
operating system 9373372


3.43 gear
245/50r16 tires
853 stock heads
4l60e stock
102mm throttle body DBC (amazon cheep)
12609749 (6.2L 2013 yukon)
MAF 12576410
MAP stock ls1
4 inch air intake pipe to non-oiled cone filter
stock manifolds to 2 1/4 ypipe no cats 3 inch cat back
stock camshaft
stock Narrow band O2
return fuel system
fuel pump out of a 2007 silverado.
cannot drive to get fuel pressure.

[gametech]

So you put in injectors that are almost twice the flow rate of stock, but did not change your injector data. No wonder it floods out. There will be lots of other issues, but that is the first most basic one that must be dealt with.