Hello all, first time poster here. Not sure where to post, figured I start here.

So I'm currently working on a 04 G35 coupe, 6 speed. Long story short this g has sat for bout 8 years. Was my dad’s car, which then turned into my mom’s daily. She got a new car one day and parked this one. After about a year my brothers go to start the car and nothing. It sat since 2016. From then on my brother and his friend have changed the following:

• both camshaft position sensors
• starter
• fuse box replacement (with some new fuses)
• clutch sensor switch
• and currently just did the fuel pump solenoid.

First thing I noticed was the fuel pump not priming and all the rubber tabs for the pedals are nonexistent. So I used my toe to press on the switch and she cranks. She is getting fuel from the pump to the damper after replacing the solenoid. I’ve been reading forums on here for a couple weeks on what it could be and it is overwhelming, basically process of elimination at this point. I’ve also been told to check the spark plugs and see if it’s getting any spark. Haven’t done so yet.

another thing to add I plug the obd sensor in and the these 2 codes popped up for the tps - P2122 & P2127. I’ve read you can bypass and still start the car with it unplugged. Didn’t work there obviously.

I don’t see a red solid light either when cranking as I’m using the original key.

any suggestions would be greatly appreciated. If I’m missing anything or something doesn’t add up / make sense, lmk. I’ll try to answer it best I can.