Lexus GS 2006-11 :: GS460 Throttle Hesitation - RPMs Very Low
Nov 5, 2012
A major throttle hesitation has developed in this car, that is so bad, sometimes when you put the pedal to the floor it doesn't want to accelerate at all. Feels like the car has a bout 25% power ,it seems to shift very weird also, its like the car is trying to keep the rpms very low. I am not positive but it seems to occur mostly when the car is first started and still cold or on very wet or humid days? It feels like the car is activating the traction control and the throttle plate is not opening all the way at wot?
I am using 5-20 oil. Maybe should go back to 0-20 oil. Cant imagine the sensors are picking up on extra drag from colder thicker oil at that close of a weight? No codes are showing when the car is checked out.
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A major throttle hesitation has developed in this car,that is so bad, sometimes when you put the pedal to the floor it doesnt want to accelerate at all. Feels like the car has a bout 25% power, it seems to shift very weird also, its like the car is trying to keep the rpms very low. I am not positive but it seems to occur mostly when the car is first started and still cold,or on very wet or humid days?it feels like the car is activating the traction control and the throttle plate is not opening all the way at wot?
Notice: already change spark plugs + A/T oil + filter
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So,I have a mk4 GTI vr6 . I've got an idle that moves about 25 rmps up and down. As well as the throttle hesitation between 2.000 and 3500 rpms only at mid throttle. Has a kinda new maf. That I cleaned. clean THrottle body kinda new coil pack and wires , new plugs. Tried a lot it all worked but it's still there.
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Like the title says my 08 gs460 is pulling to the left, the steering wheel has to be slightly to the left for me to go straight, if I straighten the wheel out it goes off to the right, it has only been doing this the past two weeks or so. I went to Lexus and they agreed it was pulling and so they did an alignment, drove home, no change whatsoever, so I'm wondering what else it could be.
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just checked my front fender liner(driver and passenger side) and noticed it was cut on the outside between the fender and liner from front of fender to back making a 2" gap above the tire. i bought the car used 2 years ago and never noticed it. i have 20k miles on it. is this a needed part to change? will water damage any items located under this fender lining? i figured they cut it out for an aggressive tire set up and drop???
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Anyways, I've put MAYBE 250 miles on my '08 GS460, and Ive noticed what appear to be wear marks from my jeans (just regular Diesel jeans). I didn't have this issue in my SC400, my girlfriend's Cayenne, or any of the other cars I drive on a regular basis. Is this common for these cars? Could the leather just be low quality? Here's a pic .....
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Dropped my car off at the shop due to the transmission lag from stop to slow speeds. Sometimes it feels like I was dragging sandbags. Then all of a sudden the car wakes up and goes.
The shop said the fluid "looks" fine but seems to think there might be too much fluid in it. So here we go with a transmission service. I hope this fixes it.
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Noticed the lights jittery or bouncy when you go over bumps or imperfections on the roads. This cannot be right?
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So I have had the car for about 6 months and on occasion I have noticed faint black smoke at start up. It usually goes away after the initial start up.
The car did get the recall or TSB on the engine valve ring issue? Not sure if that's related or not.
Also it has an aftermarket cat back Tanabe exhaust if that's relevant.
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2008 GS460. 100K miles
I have noticed when I accelerate on a entrance ramp to the highway I notice the RPM meter jerks a little like it's trying to suck for gas or something else. I can feel it in the car too. This is the only time I have noticed this. I have replaced the spark plugs about 5K miles ago.
I did bring it into the dealership a few months ago to get the fuel pump replaced as I noticed a hissing noise under the drivers side read door. They said fuel pumps rarely go bad on the Lexus. The mechanic did some fuel pressure tests and said everything looks good. He also said noise is the return line back to the pump.
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2008 GS460 ... When accelerating from a stop sign/stop light it get's stuck in 1st gear for about 10 - 15 seconds before it shift to second gear. I notice this as the engine rev's high and is not shifting. Shifter is in Automatic and not manual mode. Happened at least 4 times in the past 2 weeks. Dealership is unable to replicate the issue and transmission checks out fine. Guess I have to wait until transmission get's stuck in gear before I can bring it back in.
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Yesterday I was stuck in traffic an smelled a burning oil smell. I thought I was the car in front of me so thought nothing of it. Later in the day as i was sitting and idling i smelled it again so knew it was my car. I came home took of the plastic covers and checked under the engine and oil filter everything was dry and clean. I checked topside could not find anything there either, very clean and no signs of oil or fluid. I can only smell it when parked or stuck in traffic while driving I don't smell anything. Usually happens when I have driven several miles.
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My Sonata has developed a hesitation when accelerating from a standstill. Sometimes the symptom is worse. I haven't identified any correlation of this symptom with any other scenarios.
Symptom : When at a stand-still, lightly pressing on the gas pedal doesn't result in corresponding slow acceleration, it is only after a certain threshold (of throttle application) has passed that power from the engine is transmitted to the wheels. When this occurs, the result is a jerky start.
In other words, trying to feather the gas pedal to allow a gradual and smooth acceleration from stand-still is not possible when this issue occurs.
I believe the 09' Sonata has a drive by wire throttle correct? If so, could this be a computer calibration issue?
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I have a 2006 GS300, just took it to the dealer as the VSC light came on and had engine hesitation. After checking them out, I was told that the engine needs to be rebuilt. I was informed that due to carbon built up on the manifold is causing the problem. How is it possible for a car with just 88K miles to have this problem? Should I had them recheck? Perhaps a sensor?
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I just got a used GS350. At about 20-25mph, it can sometime hesitate/jerk when I am driving without much acceleration. If I press the accelerator hard, the car accelerates without much problem.
I tried searching through the forum but couldn't find same problem except maybe the LS460 [URL] ....
I have tried cleaning the MAF with CRC cleaner + resetting the ECU by unplugging the battery for 10minutes but I still have the problem. Strangely, I didn't have to recalibrate the windows after plugging out the battery, but the GPS did the long initial boot-up..
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I have 08 GS350 that has been doing some big time hesitating at low speeds. Brought to dealer and the mentioned water got into the transmissions and want me to pay for a flush.(I think they should, since it's under warranty). Can damage done now cause issues in the future?
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Where to find this wiring diagram? I was getting hesitation in my throttle and the EPC light kept going on.. So I did some looking and found that 2 wires pulled out of the plug in the cowl harness... There are like 5 plugs under there, and these 2 wires were pulled clean.. So I cant tell which one goes to which... I know its definitely part of the 4 wires going to my pedal...
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So, there is a lot happening with the 3.6 hesitation fix lately. Haven't seen anything addressing the 2.0T hesitation. Mine has terrible throttle hesitation - have this problem with the 2.0T and/or looking for any fix? Love the feeling of making a lane change and almost getting smacked in the rear because of the lag ...
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Have any other PP 6MT owners experienced strange throttle hesitation while shifting with a APR 1.2 HO tune? I know what turbo lag feels like, but it is almost as if the throttle position is not being read for 1-2 seconds after shifting.
No matter how hard/fast I shift, I can't get the tires to chirp, even shifting at high RPM. When I watch my speedo after shifting, the needle does not move at all until the delay ends, and of course it moves fast when the boost builds. But for 1-1.5 seconds after shifting, with the pedal to the floor, I would expect some acceleration, even not at full boost.
Even when not shifting, and going from no throttle to medium/full throttle, there is a delay with no acceleration and no significant noise/rev build.
I don't remember this being as pronounced before I was tuned. Also, I had GFB DV+ installed about the same time, but I would expect the DV+ to make this better, not worse.
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So... I had the hood open and when i pressed the gas it makes a short hissing noise of some sort... I'll try and get a video tomorrow... it only lasts for about 1-2 seconds not sure if its just induction noise...
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Took my 04 V8 in Monday AM for airbag fault, throttle hesitation, and remote key fob/keyless entry range (lack thereof). Called the dealer yesterday and service rep says airbag and remote range fixed OK, but after TSB for throttle hesitation was downloaded, the car would no longer start. Service rep explained that the shop foreman had worked on car personally for most of day and still was not able to start car.
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