hey guys last night my speedo started jumpin and i have a switch for my subs and it lights up and the light was flickering but only when i hit the gas. if i woudl coast or not nail it it woudln't happen. now this makes no sence to me and i am clueless where to look. i am makin liek 14 volt and it all seems fine. now i did think one thing. i have my lights on, mt stereo and my subs and i thougt maybe i was drawing to much power but it doens;t mke sence that it woudl only happen when i gas it gas. thanks oh yea i turned my stero offf all together and it seemed to stop

 

im having the same prob, no amp though but head lights flicker when driving only, ive already changed my tensioner, i just got a new alt, cause they said the stator and diode was bad but i need to charge the batt fully before installing. lemme know if you figure it out.

 

If the speeometer starts jumping around, wouldn't that usually be the cable?

 

Yeah, grease your speedometer cable.

 

it stoped, but its electric anyways so.personally i think it was so much drain cause i had my headlights on, mmy stereo wih my subs on. so maybe, i dunno it went away so wutever

 

How long have you had your headers?
and have you had any problems with them rusting or wearing out?