89' camaro starts but doesnt stay running

Try cleaning the throttle body and the idle speed control valve, they get full of sludge and this causes stalling. Use a product called CRC Throttle valve cleaner on both parts, DO NOT USE CARB CLEANER IT WILL RUIN THE PARTS.

No that is not possible.

are there any codes. sound like a bad throthle position sensor or a idle air control valve

Do a fuel pressure test. If you have compression, and good spark, this is where you should start.

It could be a relay that keeps the fuel pump running when the ignition switch is in the run position. My jeep had this problem, where the pump gets power in the start position but once the key returns to run, the engine shortly stops running because the pressure in the fuel line drops off as it is used by the running engine, it usually died within 3 seconds. my relay was under hood and there were several of the same type in there, I switched the fuel system one with the one for my AC(which only blows hot anyway) Hope this helps...

SOUNDS LIKE YOU NEED BOTH THE ALTERNATOR AND THE STARTER TESTED.THE CAR SHOULD STAY RUNNING OFF THE ALTERNATOR ONCE BOOSTED,IT SHOULD START OFF THE BATTERY WHEN FULLY CHARGED.

I used to have one with same problem it was the pump you may have got a bad pump when my starter was going out it did something like this two may be the injectors too

look for a bad fuel line.
Sometimes when taking a sharp turn the tire will pinch the fuel line.

it could be the fuel pump not working right. you can buy an electric one and put on there and it will tell you right away if your original fuel pump is dead

Sounds like the fuel pump may be going out. I'd have it checked.