csfi puzzling problem 1996 5.7 GM

[wicasa]

the left bank, cyl 1,3,5,7, receive just enough fuel to slightly warm the exhaust manifold. No fuel getting to them. Noid check shows current impulse, fuel pressure OK. Cylinders 2,4,6,8, fire and run the engine. What has happened that one complete bank has quit receiving fuel? Is there a central orifice in the injector system that feeds each bank? It appears that there is a blockage in the fuel route and a central point for each bank being blocked would affect one bank and not the other.

[j cAT]

Originally Posted by wicasa

the left bank, cyl 1,3,5,7, receive just enough fuel to slightly warm the exhaust manifold. No fuel getting to them. Noid check shows current impulse, fuel pressure OK. Cylinders 2,4,6,8, fire and run the engine. What has happened that one complete bank has quit receiving fuel? Is there a central orifice in the injector system that feeds each bank? It appears that there is a blockage in the fuel route and a central point for each bank being blocked would affect one bank and not the other.

the 12 volts is on the injector coil at all times..measure with a volt meter the voltage. the PCM grounds out each injector coil at the proper time with signals from the distributor/cps etc.. since one side is good must be the power to the injectors on the driver side.. also make sure the grounds are clean and secure.

measure the fuel pressures and do the fuel pressure test with the pressure gauge.

when asking questions you must give vehicle details ....

[wicasa]

Where might the grounds be? In the PCM or external

[j cAT]

Originally Posted by wicasa

Where might the grounds be? In the PCM or external

the PCM has no internal grounds of any kind.

you did not say what your working on or report on the injector voltage .. NO VOLT Meter ! you have a wiring schematic for this vehicle ?