[skittleman12]

Hello everyone,
I couple of months ago purchased a 1984 944 NA non-running from a mechanic who got tired of trying to fix it. The previous real owner had the clutch, water pump, oil pump, and timing belt replaced but never paid for it. Then it got passed around to a few mechanics, and now me. At the time of purchase, there were several things wrong:
1: The car had no tach bounce and only cranked. Upon inspection, I found that the car had new reference sensors, but they weren't gapped correctly. I gapped them using a 3d printed tool and then I had tach bounce!
2: The previous owner jumped the alarm incorrectly, I made a jumper to correctly bypass it.
3: The distributor cap was cracked - I replaced it
4: One of the spark plug wires had zero continuity - I replaced the set

After all this, the car would try to start but only get to around 300 rpm and would sometimes stumble along at 300 before still dying.

I removed the accessory belts and it would get up to 1100 rpm before immediately stalling. However sometimes if you got the gas just right, it would roar to life and run for as long as you changed the throttle position. If you stopped giving it gas OR gave it a consistent amount of gas, it would quickly die.

To try and troubleshoot this I tested and replaced several parts: (ended up adopting the "throw parts at it" method at one point)

Fuel related:
Fuel damper - replaced
Fuel pressure regulator - replaced
Fuel pressure - 30psi +
(the last guy replaced the fuel pump and fuel filters)
Gas - The last guy flushed the tank and put half a tank in
Throttle body - fully cleaned out the throttle body and can now hear the switch click

Electrical:
DME relay - replaced
DME - Tested good on another 944
Spark plugs - replaced
Battery - replaced by the last guy
Ignition switch - replaced
Tested MAF sensor via Clark's garage - tests good
Tested Throttle Switch via Clark's garage - tests good
Tested DME temp sensor - tested good but I broke it when removing so replaced it
Starter - replaced by the last guy
Ignition coil - replaced by the last guy
Alternator - tested good

Vacuum related:
ALL Vacuum hoses and intake gaskets - replaced
Tested for vacuum leaks by having a friend smoke into the sealed intake - no leaks
Tested for compression - 170-180 psi for all cylinders
Intake valve (the one for AC) - tested good
Idle air control valve (the one under the intake) - stuck closed so I bypassed it because it should be open when cold

Other:
Checked timing - All marks line up perfectly.

At this point (2 months later) I understand why the previous guy gave me such a good deal on the car. It's so frustratingly close to running, I've gone through everything I can think of to possibly fix this, read every forum I can find on no starts, and no luck.

If you have any ideas or questions I'll appreciate it!! Thank you all for your time!!!