onoiocoko

iTrader: (3)

right before the shift in WOT my car makes a sort of breaking up noise like its cutting in and out. i dont run it WOT too much but i get into it alot. is this noise coming from my heads or more of breaking up carbon build up? i dont feel power loss really, it feels more like the power is leveling off. im probably losing a little bit though. i have an 01 A4 with 83000. no codes either. its probably been happening for 5k miles at least.

badpewter-z

iTrader: (4)

does it sound like marbels?

soulless

iTrader: (3)

When's the last time you changed the plugs? Could be detonation also, which is what badpewter-z was implying.

Quickin

You burning more oil than normal? Or leaving a cloud of smoke at all when you hit the gas pedal hard?

.

Tainted

iTrader: (9)

id say do a full tune up for the hell of it and see what that does. it wont hurt and with that kinda mileage it cant hurt either way

Rob98LS1

iTrader: (5)

sounds like detonation to me, mine sorta makes a "breaking up" rough sound at 5500 and its because my car's pulling timing.

onoiocoko

iTrader: (3)

i don't know about marbles. id say maybe. but it's not even like the car is running rough. its more of a sound. definantly from the motor. maybe a slight loss in power. ive changed the plugs and wires with in 10k miles. should i check/do plugs again? or check coil packs? what should i do to check coil packs? also if its timing should i look into timing chain?

badpewter-z

iTrader: (4)

if it is knocking/detonating double check the plugs and wires, make sure all are cliped on the plug and the coil(coils will double click) then if it still does it youll have to scan it to see if it is showing any knock. if it is then the tune just needs to be tweaked a little . carbon build up over time can make a car ping due to it actully raising the compression ratio . which on a high milage motor is possible . id start there . a timing chain wont fix your timing its all computer controlled .

onoiocoko

iTrader: (3)

ill check the plugs/wires again. also should i try some seafoam for carbon build up? car has been idling rough over the last couple days. especially starting.