90 iroc hard to start when running u cant give throttle or she dies fuel pump reads 40lbs sitting or running not sure if needs more lbs replaced many sensors o2, iac,tps,map,fuel filter,rotor cap wires ignition modual always readys code 12 needs valve seals but dont think that would cause problem. when u put fuel in plenum she runs for 10 to 15min then dies wont start till u give her more fuel unplug altenator and she alows me to give her a little throttle but not enough to drive confused please help thanks Tom

 

If the fuel pressure stays steady my guess would be partially clogged injectors. 40 PSI should be fine to run it.

 

i tried fuel injector cleaners before and there was no change original problem was car lost power while running came to a complete stop stayed idiling fine but could not give fuel or she died, is there a easy way to clean injectors thanks Tom

 

If you are running the stock injectors you shouldn't even bother to clean getting them refurbished. For the same price you can get yourself a set of Bocsh 3s with a 3 year warranty from FIC (8 injectors for $170).
Fuel injector cleaner is not gong to cure the problem. It will only dislodge the the debris further into the injector filter.

 

I agree 100%...you can pull them and have a shop refurb them, IIRC I saw complete sets for under $100 on E-bay. I was lucky with mine, a friend had a brand new set of Delcos on the shelf and I got all 8 for $50.