Lexus GX 2004-09 :: 2007 GX470 - Noise Like A Slight Belt Slip When Engine Downshift To Accelerate
Apr 16, 2013
Few weeks ago I bought my first Lexus, an '07 GX 470. It has roughly 75,000 miles on it, 2 previous owners before me. Anyway, I hear a noise sometimes which either sounds like a slight belt slip or fuel being pumped into the injectors when I give it a good amount of gas and the engine downshifts to accelerate. I had the dealer replace the drive belt(serpentine belt) because of 2 reasons, it needed to be replaced and I thought that could be the problem(I did not have to pay for it since I have had some problems with the Lexus dealership I bought it from, they did it as a "goodwill" gesture, that's a story for another thread) and inspect the tensioner and pulleys, they said the pulleys and tensioner were in good working order.
I drove the GX home tonight after said replacement, and I still noticed the same noise. The best I can describe it is like I said above, a slight belt slipping noise or it could also be described I guess as fuel being injected under acceleration as soon as the trans downshifts to accelerate. I am just curious if this is normal for this engine or do I have a possible problem? It's covered under the Lexus used car warranty for another 5 months so if there is something wrong, obviously I would like it fixed under warranty if something is wrong. One thing I should probably mention is, the noise is semi quiet and I guess the average person might not even notice it.
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Had a slight shutter or jerking feeling in their LS, sort of like the rotors are warped, when they slow to a stop from 40+ MPH? I just cannot make the car stop smoothly no matter the amount of brake pressure I apply.
I can 100% eliminated the issue if I shift the car into neutral before I slow down. So it has to be the the transmission not downshifting smoothly. Done it from day one. I even replaced my rotors and brakes so I know that isn't it.
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2007 GX470 120,000 miles. Great vehicle and no problems until now. Seems I have an intermittent engine whine/whirring/zinging sound. I say intermittent because sometimes it there and other times its gone. It is fairly loud. Almost like an extremely loud alternator whine, only this sound is coming from the area near the ac compressor. There is some plumbing which runs just along the left side of the compressor pump and when I grab those lines and the little aluminum cannister in that area, I can feel the vibration in that system, big time. No vibration from the compressor pump though. Not sure what those lines are, but whatever they connect to is probably the culprit.
Its odd because the noise comes and goes. It doesn't fade in/out. It's either full blast loud, or totally gone. Once it's gone, it doesn't come back for a few days. Then one morning i go out and start the truck, and there it is again! Usually lasts for about a day, then it goes away for a week or so. After a week goes by, there it is again! Really odd. I had my mechanic look at it, but it wasn't making any noise that day (as luck would have it). He told me it was an awesome vehicle. Of course I agreed, but that didn't diagnose the problem.
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Having bought my 06 GX 470 only a few months ago, we're encountering 90-degree-plus days for the first time. There is an unusually loud noise from the engine that I'm almost sure is cooling fan noise. It occurs after running in the heat of the day. It's not mechanical noise, but a loud roar like that of a large truck engine. Is this typical for these models in the heat?
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How to diagnose the engine issue I am having. The gx currently has 96k miles and I am planning on doing a timing belt and water pump replacement as I plan on keeping it as long as possible.
One new issue that crept up is that when going down the hill the car engine sounds like it's actually accelerating and the RPM drops to as if it was idling.
Normally when going down the hill it usually stays around 1 or 2 on the rpm, it's noticeably different and just started happening recently. What might be the cause of this?
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Need to replace Seatbelt assembly on a 2004 GX 470 driver's side?
Mine reads sometimes, but other times I get the airbag warning light, so I need to replace it.
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06 GX470 muffler exhaling white smoke for a while, now the smoke disappeared, however, a new hissing engine noise is evident. The noise increases with the revolutions of the engine and it never stops.
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My 2007 GX470 after always working perfectly, is now not putting out any audio from radio, CD, nav. When you start the car, you hear a pop sound. Should I assume it is the amp? Went to Car Toys and manager who was shorthanded suggested he try resetting the radio, but out how to reset it, it that is possible.
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Interesting tale. After parking my GX on Friday night, it wouldn't start on Saturday. Starter seemed fine, Battery was cranking away but something seemed to be blocking fuel from getting to the carburetor. The Lexus dealer (50 miles away) said they never heard of a fuel pump or fuel filter being an issue on a 4 year old GX with 60K miles. I did take the battery to be tested and found out it was getting weak so I bought a replacement, but still couldn't start the vehicle.
I had AAA tow my GX to the closest dealer (Toyota) and they determined that mice had eaten through two sensor wires. They had to remove the manifold to get to the nest (?) or whatever they call these little mice homes. This meant new gaskets, replacing shredded wiring and sensors plus 4 hours labor.
Since I moved from the city to the country last year, this is the first I heard of this issue. Long term campers tell me the way they keep mice out of their engine compartments is by putting Bounce (anti-static dryer sheets) under the hood as this seems to stop the mice activity.
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My GX and I are in the south and I sometimes have to leave it parked outside all day in 100F+ temperatures during the summer. Needless to say it gets extremely hot inside and sometimes takes a while to cool down. I started using my rear AC on full in conjunction with my main AC to facilitate cooling off the interior of the vehicle. I do this even when I'm by myself because... if I'm not mistaken... the rear AC uses a completely separate unit including a separate compressor. So it seems that it would cool things down faster running both systems. Can verify that the rear unit is completely independent of the main AC system?
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I own a 2007 GX470. It has suddenly developed a loud whine. We replaced the power steering fluid (which we were told was filthy) but the whine is still there. The mechanic has suggested we drive it for about 500 miles to see if the noise disappears. I'm not crazy about driving it with the loud noise but don't mind. He says the car is safe to drive.
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I have a 2007 GX470. My range indicator was showing 34 miles left. I filled up the tank and at first my fuel guage still showed E and range was showing 34 miles. I shut off the car and the fuel gauge started showing a full tank but my range still showed 34 miles. As I drove, the range decreased to 0 and it is still showing 0 for the range. How can I reset this so that it will show the correct range? I asked the dealer if there is a reset for it and they said you can bring it in and we can diagnose it for $100.
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I usually because mine was missing up a bit. My passenger side mirror when I put in reverse angles down adequately but my driver's side barely angles down? Searched forum and web and really couldn't find anything on it? Anyway to adjust the angle in reverse, I couldn't find anything in my manual at all either. I have it turned off now because it's virtually useless with the driver's side barely even angling down.
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I am afraid to drive my car on the highway and if I am damaging my car by driving it I want to make sure I hold the auto care shop that put the wrong size tire on my car responsible.
I have Bridgestone Ecopia EP100 BL tires size 185/65R15 on my 2007 Prius that I got in 2010. Because of a nail in one tire I had to replace one of the tires two days ago. The technician said they did not have the exact same tire any more but he would replace it with something comparable.
The next day I drove 2 hours on the interstate and the slip indicator light kept flashing, it felt like the engine was revving a lot and/or the transmission wouldn't shift when I got to highway speeds, and it was a little scary. My first thought was something with the new tire since I had absolutely no problems before.
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I am having a problem with my rear suspension. The indicator lights on the dash (for the rear suspension control) are working correctly as are the controls on the center console, however the rear of my vehicle is stuck in a high position.
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I have a 2005 GX 470, I noticed a sound, like that of a belt being loose, the sound came from the front of the truck. A few minutes later the AC stopped cooling, it was blowing really hot air and then the temperature of the engine went really high. I stopped on the side of the road, when we opened the hood, the belt was not broken but there was antifreeze everywhere.
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Car is:
1) Warmed up
2) At a standstill
3) In manual mode, 1st gear
4) Traction control is on/normal
5) Sport mode is on/off (doesn't seem to matter for this example)
How to verify:
1) Hit gas, more than 3/4 down
2) Shift above 5500rpm
3) As transmission up-shifts a drive belt squeal is heard.
4) Car otherwise accelerates normally.
This happens on two IS-Fs I've driven, a 2009 and a 2010, with or without the AC on. Is this a common issue? If so, what belt is slipping?
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How to reset and remove the error code on the tire pressure monitoring system?
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My 2004 Touareg V10 TDI drives like something's not just quite right, although hard for me to put my finger on. Essentially it feels sluggish, like it doesn't downshift to accelerate as quickly as it should, and like the automatic shifting is slightly jerky. This stuff is all even more noticeable at slower speeds and going up hill, but I think it's true even on city streets.
It's happened a few times, going up a fairly steep hill, that it seems to lose power and I can't get it over 20 or 25 mph even flooring it. Then when I turn the vehicle off and then back on, it can go more or less like normal again. Still, "normal" feels to me like something less than it used to be. I've recently changed the oil and all the filters (air, oil, fuel).
The dealer's service department says they can't find anything and the computer is not giving any error codes, but I know that it's not driving right.
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I have a 2006 GX 470 with 130,000 miles on it. Recently, when driving on long trips I have noticed that the SRS bag light will come on after we stop after driving for a while. To be a little clearer, the car will start normally when cold, all dash lights will go through their sequencing and turn off. We will drive for a distance which will be long enough to heat everything up, say to the mall or a restaurant.
When we return to the car and I start it all lights go thru their sequencing and the SRS light stays on. Next morning, after the car has cooled, everything is normal again. Lexus says it is the 89170-60241 sensor assembly that is $489.26 plus $310.95 in labor to replace. While I have owned the car I have successfully replaced the air suspension rear sensors and all the O2 sensors and recently did an engine swap with my son on his Toyota Supra so I think I can handle the repair. Where is the sensor located and how is it accessed??
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Our 2004 GX has been a great car, but is suddenly doing a number of strange things - like not start. When I say it won't start, I mean you can turn the key, the dash lights up, the steering wheel adjusts, radio goes on, etc, but then NOTHING! No solenoid "click", no starter noise, NOTHING! Does not crank at all. The car just turned 60,000 miles, is in great shape, lives in the garage and has never been in an accident.
After the first couple of times it did this, had the battery replaced, as it was getting close. and then the car started again. Until the next day. No rhyme or reason as to when it would do this. It might start 10 times in a row, then NOT start for a while, then magically fire up instantly, even after several key turns. I wiggled the key, tried a different key, shifted to Neutral, wiggled the shifter to try to rule out security interlock, bad ignition switch and shift interlock. No dice.
Did some more research and thought it might be the starter relay - banged on it and it started, so replaced that part. Didn't solve the problem. It also began to randomly die while idling (in park, or in drive). Sometimes it would re-start, sometimes not. The times it has done this, it typically dies after running or 15-20 minutes, but NOT ALWAYS.... Sometimes it will die once, then be good for the rest of the day. Sometimes it re-starts immediately, after a few minutes, or more recently only after sitting for a few hours.. So basically we can't use the car.
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