My 1995 Silverado, 350, AT, runs really bad until I unplug the Alternator ?

Asked by Apr 06, 2016 at 11:02 PM about the 1995 Chevrolet C/K 1500 Silverado Extended Cab Stepside SB

Question type: Maintenance & Repair

No power, Falls flat when I accelerate, Frequently dies, Idles rough. I replaced the fuel pump, fuel filters, rebuilt the TB, replaced both injectors, Fuel Pressure is good. Replaced MAP Sensor, Temp Sensor, Throttle Position Sensor. Replaced Coil, Alternator, Distributor, Battery, Computer, Instrument Panel Circuit Board. No Check Engine Light, No Codes. 14 volts on the dash-gauge and on the Battery. I discovered that when I unplug the Alternator: It corrects and runs great except my dash-gauge drops to less than 12 and falls as it runs (running on the battery) I'm out of ideas.

2 Answers

I forgot to mention: replaced Intake Manifold Gasket, checked for vacuum leaks. Replaced Plugs, Plug Wires, Ignition Module, Cap, and Rotor. I will appreciate any help. Thank You.

Anyone ?

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