Hey i have a little problem when i rev my car past 4.5k the tachometer starts to jump radically. whats the issue? how can i fix this? I am guessing its a electrical problem not mechanical. Help me out please. My mods are intake and headers.

 

bump

 

it maybe ur dizzy

 

I SAY THE SAME AS SPOOLING SWAP A DISTRUBATOR

 

do spark plugs have anything to do with it?