I'm fighting a knock problem and notice that voltage recorded by SM is around 12.2. I'm afraid low voltage is causing me to lean out.
Straight off of the alternator at idle it reads about 13.2 at idle. When the Ramchargers dual fans kick on, the voltage drops to about 12.5 (read with multimeter). Read at the battery, I get nearly identical readings. When cruising around town, with the engine all warmed up, the SM reads about 12.2. Are these pretty abnormal?
Car has Impala SS alternator and had 2 local parts stores put it on their machine and it passed. Battery is only a year old and also passed. Using ohm meter I've checked and my grounds seem good. PS head grounds moved to intake. Fuel pump has hotwire kit. On top of this, if I leave the battery connected, my battery is dead in a few days and have been unable to identify a short thus far. Not sure if I've got a short or a charging problem or both.
Any ideas are greatly appreciated. Thanks.
Straight off of the alternator at idle it reads about 13.2 at idle. When the Ramchargers dual fans kick on, the voltage drops to about 12.5 (read with multimeter). Read at the battery, I get nearly identical readings. When cruising around town, with the engine all warmed up, the SM reads about 12.2. Are these pretty abnormal?
Car has Impala SS alternator and had 2 local parts stores put it on their machine and it passed. Battery is only a year old and also passed. Using ohm meter I've checked and my grounds seem good. PS head grounds moved to intake. Fuel pump has hotwire kit. On top of this, if I leave the battery connected, my battery is dead in a few days and have been unable to identify a short thus far. Not sure if I've got a short or a charging problem or both.
Any ideas are greatly appreciated. Thanks.