I've been having trouble latley with my car not having much power below 3000rpm then after that acting like normal. Well, when I picked my car up from getting my new tranny fitted (new battery at same time), the drivers side fan was for some reason on all the time. When I've been sitting at a stop the volt meter has sometimes dropped by a few volts and the engine RPMs go down a litle also. Getting to the point.....After driving the car tonight I disconnected the fan so and for the first time in bloody months I was able to put my foot on the brake and push the gas to stall my car to the point it broke traction!! After working on this problem for weeks now, the whole experience absolutley floored me. Could it have been a combination of a weak alternator and too much power being drawn at lower RPMs? I'm going to test it more tomorrow, but I'm just wondering if this combination of things could have been causing me problems? Thanks for the help. Robert

If your car isn't charging correctly, pretty much all the vehicle systems are gonna be effected. The fuel pump will be slower, injector PW is increased per programming, ignition can't fire the required voltage, and if the voltage gets low enough the ECM can't operate at all.

What kind of voltage are you looking at? I'd replace or rebuild the alternator as soon as possible though. With less voltage, all the wiring and components are working harder than needed, which is gonna generate more heat and wear the stuff out quicker. Ohm's law

Go to NAPA, get a new alternator, install it, if it makes a difference then congradulations you found your problem. If it doesnt solve your problem, take it back for a full refund. NAPA hates me

Oh, and also, if your accessory belt is reaaaaally loose, you can have the same symptoms, why not change the accessory belt anyways... probably hasnt been changed or adjusted in a while anywho