Runs when it wants to

93 cutlass ciera 3300 changed fuel pump and filter now will run fine till it decides to take a break. will not shut down on you but you shut off the moter and then it just wont start sounds like it wont git fuel I cranked on it disconected the battery re conected cant put my finger on whats wrong parts guy keeps telling me its the brain i want a second op.. before dropping another 300 in this junker

So, when it won't start does it have spark to the plugs, got fuel pressure at the rail, just basic diagnostics here.

has no spark just changed plugs 3 months ago did not change wires im not very smart on cars think i should gothat routnext im really leaning to the fuel but ill take all sugg.. been putting money left and right so gitting discuraged

If no spark ,the crank sensor and ignition control. module should be checked.

ty very much will try that next i dump too much money in to this car to much more its gone