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Pontiac Sunbird Questions

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Occurred when car ran for a while. Car cut off and will not start at all now after replacing starter and alternator.
If I turn defrost off the engine overheats even though I have plenty of antifreeze/engine coolant in the car.Also,antifreeze leaks from both sides of the radiator hose,it leaks onto the engine and the ground but there is no hole in the radiator hose.Perhaps the hose should be cut down and tightened?If the defrost is not constantly on the temp gauge goes in the red and smoke comes from under the hood.Thank you.
The car will start when primed but can't get any fuel without correct throttle cable hookup.
Can't find a picture anywhere.
It will Rev constantly and I looked in the carb, the carb is constantly spraying a lot of fuel once the car is cranked. How do I fix this?
I'm trying to find out what might cause the fuel injector in the throttle body to not give enough fuel occasionally when the engine is under load. Feathering the gas will keep it going sometime so I think it's fuel-related. Is there a fuel filter in the throttle body under the fuel injector maybe clogged? Vacuum hoses look fine. Does it have a ECR valve?
it chugs when accelerating between 30 and 40 almost like trans. slipping and again 60 to 70. sounds like a hard knock. replaced spark plugs. try to get code but when shut off turn back on engine light off
when i start my car it will either run fine, idle high, or almost stale.
-The idling high problem will also happen if i get on the gas or put it in neutral and rev the engine. it will slowly go back to normal or if i rev the engine a lot it will go back to normal faster.
- the almost stalling problem happens when i start the engine and when i come to stops
ran fine befor no warning
there are other problems, like the turn signal lever with the cruise control is broken off with the wires severed.
Engine will not restart unless you put accelerator to the floor. Acts like it is flooded. After start it idles rough and wants to stall. After it sits for awhile it will start & run fine for approx 30 min then problem repeats.

Note: Check engine light illuminates after 3 min. Pulled the code which was #12

Many thanks,
Larro K.
found it on the fire wall but can't find out what it controlls
I've replaced the fuel pump (twice)7 fuel filters, 2 strainers, idle air controller, maf sensor, spark plugs and wires, throttle position sensor, fuel pressure relay, fuel pressure regulator, some vacuum lines. Car ran then loss power, limped to the side of the road and died, hasn't ran for more than 10 seconds at a time since. Gas tank was dropped, cleaned before the 2nd fuel pump was installed and 7th fuel filter. Car drove fine for about 20 miles then loss power and died, has ran longer then 10 seconds since
I've replaced the fuel pump (twice)7 fuel filters, 2 strainers, idle air controller, maf sensor, spark plugs and wires, throttle position sensor, fuel pressure relay, fuel pressure regulator, some vacuum lines. Car ran then loss power, limped to the side of the road and died, hasn't ran for more than 10 seconds at a time since.
My converter is clogged and causing severe power loss, it has now been cut out.. don't care to replace it unless absolutely have to. can it be straight piped/glasspack or will it not run correctly due to the low/no back pressure?
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