Kevin,
No problem. I just try to put as much info as I can from the manuals. That is why I got them, primarily to better understand things and to try to help others. Every time I try to help with an answer, I learn a little more, and that is a lot easier way for me to learn the systems than to just read the manuals.
The underdrive pully may tend to spin the alternator a little slower. From what I understand the water pump is not belt driven (not sure about this). The way the PCM controls the charging rate is by "pulsing" the field of the alternator when the data it receives tells it to do so. In this way, the more often it pulses, it apporaches steady voltage to the alternator, while apporaching steady charge. The underdrive pully may increase the pulse rate over that of the standard pully due to the slower speed the alternator is being turned. As long as it is turning above 380 RPM to 1125 RPM at idle, it is supposed to be able to provide full charging to the battery.
The battery temperature sensor that is located under the battery tray also tells the PCM if the battery is being charged too rapidly (battery heats up) and the PCM will respond to that by slowing the pulse rate until the battery returns to normal temp.
The short answer - as long as you don't receive any of the error messages listed in the other reply, you should not have a problem.
Enjoy,
David
|