1995 Toyota Land Cruiser - Whistle Sound Between 28-40 MPH

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gummycarbs said:
If I use the sunroof tilt function and then close it again, I'll get a slight whistle at speed. If I then slightly open and close the sunroof the noise goes away.
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Exactly the same for mine, also pushing the screen across tight helps quiten wind noise.

One other annoying whistle is the drivers (RHD) door mirror, if not correctly turned back to its normal resting position perhaps after being hit by the car wash, this is easily solved, just a gentle touch and no more noise.

Re noise before/during and after gear changes, try getting up to say 50 MPH and CAREFULLY select neutral and coast down the speed you normally hear the noise, this takes engine revolutions and shift changes out of the equation.

Regards

Dave
 
I am a new 80 owner as well. 1995. Mine has the same high pitch noise when accelerating from around 35 to 55. Wasn't sure if it was on the intake side or not. I thought maybe a leak somewhere on the intake or hose. Glad to know its normal.
 
I've got the same problem with my 1995. Its definitely not an exhaust issue. It happens between 20 and 45 mph and is coming from the PS side . I've taped up the outside of the truck to seal up all seams such as around the door frame, window frame, sun roof, mirror, etc. but its still there. If I crack open the PS window it goes away. Best guess is there is a flow of air caused by forward motion that is coming through the air conditioning system. I've had this whistle since I got the truck in 2005....I've had passengers try to find it...no luck. Let me know I you find it
 
Between my engine ticking, wind whistling through failing door and window seals, and gear rattling I can’t hear the person sitting in the passenger seat let alone a “whistle”.

For a second I thought we were in the 200 section...

“Buffy, do you hear that? It appears we have a dastardly draft somewhere! We must drop this off to the mechanic immediately! We don’t want Caroline or John Paul to catch the sniffles!”
 
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I came across this TSB in my files:

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Sure enough - taped that lifted piece on PSD and sound is gone. Actually, on this LC those pieces are cracked on each of the 4 front windows. Anyone know where to replacements for those?
 
The whistle under load is most definitely coming from the exhaust system. I’ve had three different 80’s in 4 years and only one of them did this until several months ago when my current rig, a 1993 with 281k, began whistling at around 273k.

It does this when the engine is under load accelerating at anytime unless the engine loading is very light.

If, indeed, this whistling is coming from the cat, this could be a sign of cat degradation. It’s very annoying to listen to for miles at a time while ascending a mountain at highway speed. Actually, my whistle is audible while cruising flat ground at highway speeds but not so loudly.

As a cheap first step toward rectifying this problem, I ordered a direct fit Walker muffler which I can change out myself.

This whistling may not be a sign that your 80 is about to die, but it surely is NOT normal.
 
scottryana said:
Oh man poor Mark III Supra's they are the stepchild of the Toyota world. When they went to show off, they were in the wrong lane, ran the stop sign, swerved erratically. I have seen Mark III Supras in some of the worst possible condition still being driven around. lol.
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How dare you, mine has been definitely treated as my first child. But yeah, so many have had a rough life for sure.

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Haha I am not saying I don't like them, just the opposite in fact. When I was looking for a cheap track car to just strip down and run cheap with my buddy who has a race prepped Cobra, I was looking at MkIII's because you could pick them up beat for cheap. But I think that those that have kept hold of them and kept the very clean will be surprised to see the market jump. With MkIV's getting crazy expensive I think people are kind of looking at the MkIII's as a way to get a Supra.

2KCruiser said:
How dare you, mine has been definitely treated as my first child. But yeah, so many have had a rough life for sure.

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I had a very slight, brief whistle on acceleration when cold. When I changed my oxygen sensors, the nuts were rounded, so I used hardware store nuts. I finally put on new Toyota oxygen sensor nuts and torqued them down well and the whistle is gone. Just a thought.
 
gummycarbs said:
I had a very slight, brief whistle on acceleration when cold. When I changed my oxygen sensors, the nuts were rounded, so I used hardware store nuts. I finally put on new Toyota oxygen sensor nuts and torqued them down well and the whistle is gone. Just a thought.
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Why would that be? I don't understand. When I accelerate (with windows open) I have (not a whistle) but I like to think a supercharger whine (very faint; no SC, just a whine) and I also have the code for the O2 sensors. Perhaps it's all related.
 
rolliges said:
Why would that be?
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Absolutely no idea! Maybe there was a tiny leak from a slightly loose sensor. Or maybe I slightly twisted the whole thing and fixed something with the downpipe. Or maybe it's entirely coincidental with recent weather changes.

a supercharger whine
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I have that on higher RPM under hard acceleration. I assumed it might be related to the PAIR silencer box attached to the air filter housing on my '94. Not that there PAIR is active, but because it's a route for air intake noise to escape.
 
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