WTF is that sound???

[Drew]

Anyone get a buzzing sound in their engine right above the fuze box. I sware is sounds like a big ass carpenter bee. It goes off every so often after I cut the motor.

Thoughts?

Buzzz....Buzzz..............................Buzzz......Buzzz





Drew

 

[gapboi210]

Mine does it too someone said it was the charcoal canister. It does it even with the battery disconnected.

 

[kregg]

yep mine too... a little annoying but i dont think it hurts anything...

 

[loner]

It's definitely the charcoal canister.

Next time it is making the buzz, pop open your gas cap and the noise will stop.

Toyota had a TSB on this for the Tacomas of that vintage, so I assume they had it for the 4Runner too. It cost like $25 for the part to fix this - IIRC, but that was about 7 years ago so I could be wrong on the cost. It was a very easy fix, too - just add a little "muffler" to the charcoal canister.

 

[gapboi210]

Does it affect anything like emmsions or gas milegae? By adding the muffler I mean. Also does the canister ever have to be serviced?

 

[RonMAIDEN]

My '97 did it alot but it's nothing to worry about. My '99 does it when it's really hot out but it's still kinda rare.

 

[loner]

Does it affect anything like emmsions or gas milegae? By adding the muffler I mean. Also does the canister ever have to be serviced?

No. The noise is just you canister purging air. When the air comes out, it makes a fart noise. The muffler thingie just quiets the noise.

Here is the TSB number: EG002-97

 

[gapboi210]

So does it ever need to be serviced?

 

[loner]

So does it ever need to be serviced?

By "it", I assume you mean the charcoal canister. Charcoal canisters don't get serviced, AFAIK, but they do need to be replaced on rare occasion ($$$). Most likely sign of a bad charcoal canister would probably be the engine computer throwing an emissions-related code.