High pitched whistle (2 Viewers)

[snowwolf]

I have a high pitched whistle on hard acceleration or up hills under load, I would suspect a cracked vacuum hose but can't find anything, not the sort of thing you can make make the noise when engine is not under load, is there a specific tube that normally fails?

ps I dont have a turbo

 

[gotmud]

Lots of folks on here have attributed a similar sound to their exhaust. Perhaps that is your culprit as well.

 

[BrotherRob]

x2, American spec 80s have a pronounced whistle from the exhaust when accelerating. Unless the UK 80s are different, you are probably hearing the same noise.

 

[80t0ylc]

If you've removed your resonator, the whistling is much more noticeable. (That's the muffler looking thing near your rear bumper.)

 

[snowwolf]

It's only just started making the noise, and definitely sounds like a vacuum leak, does the exhaust whistle stop if you remove the muffler?

 

[BrotherRob]

Any of the locals who have changed mufflers have lost the whistle, so presumably, its in the muffler. I would try driving with the windows down or have someone listen while you drive by before taking anything apart. If you have a vacuum leak that is loud enough to hear from the driver's seat, it should be obvious if you open the hood and accelerate the engine.

 

[80t0ylc]

It's only just started making the noise, and definitely sounds like a vacuum leak, does the exhaust whistle stop if you remove the muffler?

We are talking about a gasoline powered 80, right?

BTW - the gas powerd 80 had both a muffler and a resonator, just to be clear.

 

[snowwolf]

yes it's a gas/petrol powered engine, I would have thought if it was the muffler I would have had the noise all the time I have had the car, I have had the car 5 years or does the muffler whistle start at 150k

 

[80t0ylc]

yes it's a gas/petrol powered engine, I would have thought if it was the muffler I would have had the noise all the time I have had the car, I have had the car 5 years or does the muffler whistle start at 150k

No, the only reason I brought up exhaust or muffler is because I've heard that is where the source of the whistling that you describe comes from. Is it possible that you have a new hole in your exhaust or muffler that is allowing more noise (or whistle) to escape?

 

[davnic6]

Check the other threads on this I believe some have posted that the noise is still there even with a different exhaust system. My son has a 96 same mileage as mine and his does not whistle at all.

 

[Lka1988]

Mine stopped whistling after I removed the muffler and put a glasspack in its place.

YouTube - Cherrybomb on a 1991 FJ80

 

[landcruising]

If you replaced your fan belts recently make sure they are OEM toyota without the rib texture. The rib texture in combination with a bad alternator pully made an awfull whistling type noise before I replaced them.

 

[torfab]

I removed the resonator as well, and it makes the whistling much louder. It was there prior to that too though, but wonder if a flomaster or different muffler might make it better.

 

[snowwolf]

It does sound odd that even after some guys have replaced parts on the exhaust system, the whistling is still there, over the weekend I am going to place a sound recorder under the bonnet/hood and also under the car near the end of the exhaust and see what I can get.

 

[Turtle Master]

80's make a sweet whistle under hard acceleration, "Made in Japan secret squirrel whistle"