rx_7_driver

when ever i ride around at night with all my electronics on my dash makes a odd low buzzin noise at idle. it stod once the rpm's reach 1.3k, anyone have a clue what it is? it will stop if it shut the car off and restart it.

Anyone care to take a guess at what this might be?




- Shawn

rx_7_driver

update it now does it all the time at idle,with no loads on the engine


-Shawn

Cosmo Donk

Maybe a bad ground for the radio. Is it coming through the speakers? I would check the grounds for various things, engine, radio, ECU, etc.

hugues

Most likely you alternator is on its way out ...

or the cabling ... (battery to alt, grounds, blah blah) ...

Check the voltage !!! that will tell you immediately.

or it could be something stupid like a bad connection somewhere ... example: too many keys on keychain causes ignition switch contact problem (probably nothing to do with your problem but just an illustration)

Hugues -

rx_7_driver

well i do think the alt is about to die, its from auto zone i also saw that the postive wire on the alt is fried, brittled and missing plastic on it, i have a s5 alt sitting at my house i do belive they are direct swaps.





-Shawn

rx_7_driver

well,ifound the source of the problem, its the cpu, i guess that means its about to die, and to top it all off i my u-joint went out and i found out u cant replace them u have to buy a new shaft......... Grrrrrrrrr...... not a good day


-Shawn

vrooom305

if you replacement alt is from an S5 then you'll need to change the wireing harness

w_hari

Hey Shawn.

Its definitifely your alternator not the CPU!!!
Had the same problem some month ago and the voltage regulator of my alt was bad. The CPU is just making the buzz because the voltage is to low. But it is not bad! Its the ALT!!!

Harry