wut in the world is this noise? (engine)

[fatngs]

06 camry SE 2.4 65k US built

engine maint: pcv, throttle clean, k&n intake just done; NGK IR plugs @ 50k (just for the hell of it); water pump & tensioner @ 47k; oil changes every 5k synthetic since around 40k, owned since 33k; history shows headers & 1st cat were replaced @ dealer before i got it and 2nd cat along with resonator and muffler were replaced after accident at about 51k (not sure if either o2 sensors were replaced)

MIL light is NOT on

i shot a video of the noise..... its coming from the top of the engine around the coils/fuel rail

the video amplifies the noise a bit but it sounds accurate

You Tube

You Tube

i scanned the engine with the good code reader from my store (advance) and it came up with cylinder 4 misfire *PENDING*..... i cleared it and went back today to see if it was back and it wasnt

i have a feeling its a coil but what do you guys think? saying it is a coil what brand do you recommend?


forgot to add: ive also notice a random burning smell coming from the engine bay and a tiny bit of random white smoke coming from somewhere on top (only when hood is up)

[BlackCamSe]

Might be headbolts man. Especially with the white smoke and burning smell. It wouldn't be a misfire on all cylinders if it were one coil. And I doubt they're all bad.

[fatngs]

ouchhh i pray its not the head bolts lol

[johnfrisco]

If it is a head bolt issue it would be the first of me hearing/reading it happening on a 2006. And with so low miles I would be surprised.

How's your coolant level?

[fatngs]

coolant is ok..... hvnt had any problems with the cooling system except the water pump taking a crap

the engine really hasnt felt any different or less powerfull..... i dnt think the fuel mileage is great but i do have a lead foot

i really have a feeling its either something with the fuel rail or a coil

[fatngs]

a buddy at work pulled off the hose to the pcv valve and the engine stalled..... he told me to exchange the pcv so i did and the noise is still there..... i'm gunna pull the plugs 2moro when fixing my brakes and see if perhaps one is fouled.... i purchased new NGK IR premium plugs just in case

[fatngs]

replaced the plugs just for the hell of it..... the ones in there looked ok and had normal wear

my buddy thinks its that fuel regulator on top near cylinder 4 on the fuel rail..... i'll have to check around on how to change it and where i can get it (i hava feeling its a dealer part)

[RICO8458]

sort of sounds like a grinding noise? or electric generator noise? i hear a similiar, not the same, but similiar thing on mine, but very good vid on the issue.

[fatngs]

well the noise is still there......... my buddy took a automotive stethescope lookin thing and said it was coming from the fuel rail

do u guys think i should replace the injectors? i can get reman ones for about 30 a piece off rockauto; my boss said i should just leave it because the car doesnt have any loss of power or anything (btw im averaging 21-22 mpg with a lead foot)

one thing i noticed today tho... i had my A/C blasting today and the noise went away when the compressor was engaged and came right back when it cycled off

[Punks_Not_Dead5]

Maybe the lead foot is the problem.... take it easy! That is horrible mileage for the I4... i get 35mpg on my V6...and i do a lot of track days and still average around 25-28 on those days.

[PRNDL]

Sounds like a vacuum leak to me...ck the hose on the left behind the first injector...looks like it's pulled off a bit.

[fatngs]

the pcv hose seems pretty tight.... the noise sounds electrical to me

[Dapuzzlar]

That is soo strange. My 02 Camry SE I4 just started making the exact same noise about 6 months ago. I cant figure it out either but it started right after I changed the PCV valve.

[devind05]

07 camry also started making noise when I auto-start my car from remote and I hear almost similiar but it goes away after 5-10 mins.

[fatngs]

i think i might grab a new hose clamp from work and see if that changes anything