- Dec 8, 2011
anyone know whyat about 3-4k rpm the interior and head lights start flickering a bit ?? noticed it tonight when i was passing some cars kinda wierd
the roadie said:Spark plug mis-activity could not cause voltage fluctuations that you could notice on lamps. Above 1K RPMs, the alternator should keep the voltage very steady unless you have some other varying load or bad wiring connections like the battery ground to the body or alternator to battery.
Tofer76 said:well today i noticed that it has moved down the rpm range. i mean that now the guage drops and everything draws down at a lower rpm around 2200 now . it wont do it at all under that range. i had autozone and oreilys at 2 diff locations test and 3 out of the 4 said bad batt , so i put in a new one (under warr.) and it still does it. tomorrow im going to change the belt then check, then pull the alt and take it in to have checked