91 camaro turns over but wont stay running

fuel pump, filter and ejectors maybe bad need to check those three

CHECK SPARK PLUGS AND TIMING ~~( ALSO TUNE UP DISTRIBUTOR CAP, EGR, O2 SENSOR) , VACUUM WILL CAUSE LOOPS BUT WONT CUT CAR OFF

I guess my first question is how do you know the injector has fuel ?
You would need to know if the injector is getting voltage and pulse from the computer, and if the fuel pressure is enough to allow the injector to spray.

Could be a problem with the pickup coil in the bottom of the distributor if equipped. The pickup coil provides the crank signal for the injectors and ignition module.
Did you clear the code and then 53 came back ?
On most models code 53 means the computer or one of the components is getting over 13 volts.

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

Is the fuel filter ok? - fuel pump ok? Sometimes a new fuel pump is faulty. You may need to check your fuel pressure. Could even be a plugged fuel return line. PS be careful using starter fluid - it can be hard on an engine. Le t m e know. Thanks

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...

usually when the camaro runs rough that could be bad fuel injectors-o2sensor and fuel filter-thats my guess i had the same problem and i put bad gas in and the fuel filter went bad

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

In reply: if its not the maf there are 2 relays in the relay box i belive its underhood, 1 primes the fuelline to 32psi the second kicks in after it starts, and keeps it running and varies the psi. if the primer relay isnt kicking in then it wont start due to no fuel

THX

Don :)