Chevrolet Repair: electrical problem, s10 blazer, electrical problem

Question
i have a 94 s10 blazer 4.3 vortec.when i start my truck the volts read 14,thats normal but now when i rev the engine the volts start jumping but not past 15 and the headlights flicker and when i let off the gas the volts drop below 12.the same if accelerate a short distance then come to a stop. i just put the alternator and the battery in like 3 months ago. could it be the fuel pump?? please help

Answer
Hi Gary, This sounds like your new alternator is bad. I would check all connections and if everything looks good get another alternator. This one should be under warranty and only cost you your time.

Hope this helps

Have a Nice Day             Mark