Cadillac: 1995 Cadillac 4.6 driveability, oxygen sensor, repair attempts

Question
No injector pulse back 4 cylinders--one back injector has pulse for about 10 secs.  Quad Drvs good, module and cmp/cnk sensors okay.  This is inherited after many repair attempts.
what could cause the injectors not to fire on back bank of the injectors.

Answer
intermittent short to voltage in the rear oxygen sensor.

traction control problem.

intermittent lose of battery voltage to injectors.

intermittent lose of battery voltage to rear oxygen sensor.

intermittent faulty rear oxygen sensor.


You can test the injector pulse width and the rear oxygen sensor and numerous other systems via the onboard diagnostic feature via the climate control panel.


FOLLOWUP: Are you getting any computer codes or display messages ?.