Thread: alternator replacement engine running better ???

Dont know if its my imagination but I just replaced my alternator on my 89 rangie 3.5efi that died and the engine seems to be running much better , performing better and sounds better out the exhaust .
Wondering if the charging voltage was down on the old one causing the ignition to be weak or something but still just enough to keep the batt charged .

or could my fuel pressure have been down if voltages were down ?
I point out though that I never had battery charge problem ,it never went flat with the old alternator .