Lexus LS 2007+ :: Loss Of Power - Hesitation When Accelerating After Turn Intermittently
May 1, 2015
I have owned this car for six months. The car now has 39K. The problem is getting worse.
Re: Lexus 2011 LS460 AWD
Subject: Hesitation / momentary loss of power when accelerating after turn.
When accelerating after a sharp turn with light to moderate acceleration, the car will have a momentary loss of power for about 1, 2, or even 3 seconds. This does not happen often, but perhaps once every two weeks and I cannot replicate the problem despite attempting to do so.
In all cases, I am talking about DRY pavement. It always happens after a sharp turn usually to the right. (Probably because most sharp turns are to the right actually it only happened once on a left turn that I will describe below.) Acceleration is light to moderate NOT hard acceleration.
In one case it caused a serious situation. I had just purchased gas and was entering a busy freeway. When accelerating, the engine had a total loss of power for a couple seconds as a large semi truck bore down on me with its air horns blaring.
I have a strong clue that may debug this problem. Once, when turning left, the car suffered a total loss of power. There was no traffic and I kept my foot lightly on the throttle. The car remained unresponsive. The engine did not stop, but it did not respond and remained this way for at least 5 seconds until I took my foot off the accelerator and then back on to the accelerator. During this period of suspended throttle, I noticed that on the right side of the dash an orange alert symbol was flashing I think it was a swerving car? I assume this indicated that the car was losing traction and the computer decided to cut power until traction was regained. But the pavement was dry, and the acceleration was normal. In no case did I ever sense that one of the wheels was slipping.
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I have a 2007 LS 460 with about 50,000 miles. Some 18 months ago, at about 35,000 miles,right after a service, I began to experience hesitation/lack of power when accelerating from a stop. Lexus fixed this by doing a software update to the transmission.
All was well till last month, when again right after a service, the car hesitated and totally lacked power , most noticeable from a rolling stop. Revs would very gradually climb to 5,000, with foot flat on accelerator, yet car barely moving. Once speed built up to highway speeds, car reacted normally. Took it back to Park Place Lexus who held the car for 10 days and did a major job changing the cylinder head, I think per L-SB-0033-08.
A month later, the hesitation/lack of power is even worse then before! I suspect the issue is the transmission, and the big surgery on the engine done last month was not required. After nearly being hit trying to merge with traffic today, the vehicle is back at the dealership, and I took their head tech for a drive. He experienced the problem, but did not venture a solution. He told me they take instructions on what to do directly from Lexus.
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I have sent my 2008 ES350, 47K to a dealer since it has a bit hesitation on accelerating; RPM goes upto 3K easily to get engaged to next one.
The dealer told me that no hardware problem but they did update a tranny firmware. They added that it may work right away or work after 3~4 fuelings.
What would be next step?
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When I take off from a start it will intermittently stumble or hesitate, seems to be around 1500 rpm. have also noted it at higher speed while cruising. its more like a momentary power cut than a miss fire.
So far I have done the following
new fuel filters
clean MAF
new PCV valve
new spark plugs
check all hoses and plugs etc
injector clean
checked techstream for codes. there is one for a heated O2 sensor but dont think thats it.
2002. SC430
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My wife has had her 2010 3.5 Santa Fe since new. Over the past year it's been having a clunk develop when accelerating, happening a few times from a start until highway speed. The clunks almost feel as if one is driving over bumps - that's what I thought at first. The power doesn't seem to be there anymore either. I have been driving her vehicle the past three years and it was fine when I first started driving it. But the past couple years I first noticed a problem and it seems it is getting progressively worse. My wife now notices it quite a bit too.
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I have a 2007 Ford Fusion 4.0L AWD. One day I went to pass a slower car and accelerated rapidly, but the car responded with loss of power and shook to a stop and would not re fire. I took it to the dealership and they said two cylinders were not firing and a fuse was blown. I looked on the internet and some people said their coils go bad or plug wires. I asked the dealership if that was the cause and they said absolutely not, but it's the ECM. They replaced the ECM and 2 days later my CEL came on and I took it back to the dealership and they told me my catalytic converter was bad and I could drive it until I had the money to replace it. Then a couple days go by and I was passing a tractor on the highway, I slowed down to 45 mph to make the pass and as I began to accelerated I felt a thunk, then about a mile later it started cutting out and shaking. This time it would re fire but idle rough. I tried on/off 3 or 4 times then it idled o.k. I then took it back to the dealership and this time they said it's all 6 coils.
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I'm not sure whether it's real or even possible. Starting this summer, when it's hot and I turn on AC, I feel loss of power from the engine. When need for speed, it's slow to accelerate. The engine is less powerful than when it's cool and no AC running. Is this possible? It's 2010 V6 AWD.
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I have a 07 Camry LE. I recently replaced the belt tensioner and belt. A couple, maybe three weeks later its having symptoms of hesitation when accelerating and when at a stop. The rpm's are stable but seem to dip below its operating specification, causing the car to come to a wobble felt just like when you're in too low a gear when driving a standard vehicle. I suspect it may be air related but that's just a guess. I have not looked under the hood yet since its dark out and would like to get some feedback on this problem. Another probable cause I suspect is the fuel filter. The car has 113,000 miles and i doubt its ever been changed (I am the second owner).
Before I changed the tensioner I could be a stop and then suddenly press the accelerator to avoid oncoming traffic. The car will stall and die sometimes. It's has only done this to me on two occasions. Both at the same location. Rapid acceleration at this point was on an incline. If it matters.
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Over the past few days driving my ls460 I've had a niggling feeling that something isn't quite right. The power delivery seems a bit inconsistent and although the engine sounds fine, I can feel something a bit 'rough' through the pedal.
At first I put it down to my imagination, but a few minutes ago I was driving along at a steady 40 and for a brief second the engine power cut right down and something flashed up on the screen along with a beep.
It happened so quick I couldn't have read it even if I were staring at the screen.
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2009 LS460 I have had my car at the dealer a few times for loss of power on acceleration. The last visit which lasted three weeks finally gave a diagnoses. The problem was confirmed by the dealer and the factory reps, a knock sensor picks up a signal that retards the timing resulting in no power, I was nearly run over by a semi the last time it happened. They tried to give me my car back on 7/24/14 with the knowledge that the problem is not fixable at this time but I should drive the car and they will tell me when there is a fix. I left the car at the dealer. I was also told that they had a few others with the same problem that could not be fixed.
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Our 2015 es350 with 2,500 miles hesitates when accelerating from a dead stop, such as from a stop light. We are told this is to be expected with this vehicle. The dealership test-drove the car and say there's no problem. But this hesitation is unlike any other car we've experienced.
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I traded in my 2015 for a 2016. I had the hesitation in my 2015 when moderately accelerating out of corners. So far in the last 1000 miles on my 2016, no hesitation.
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My 2001 VW Passat 1.8T manual transmission is experiencing loss of power/hesitation during acceleration. Occasionally the check engine light will blink for about 10 seconds during this time. My valve cover gasket blew about 7 months ago. I had it replaced along with 2 ignition coils. Since then I have had replaced the other 2 coils and spark plugs because of this recurring problem. I have also replace the mass airflow sensor for the second time. The diagnostic check continually shows misfires in different cylinders for which I again tried replacing the coils. I have also received the codes for "fuel mixture too lean" as well as for too rich. What could be causing this?
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I purchased a 2007 Sonata with the 3.3L about six months ago. I really like the car, it has a lot of good features and lots of power; however, I am starting to have problems with the car. On accelerating from a stopped position the car almost quits (hesitates severely) and then picks up and goes on normally. Also, between 40 and 50 mph the car starts to jerk pretty hard for a few seconds and then it straightens out and runs normally again; it will do this repeatedly if it is kept between 40 and 50 mph.
When this first started happening the CEL would come on randomly and stay on for a day or two and then go off. While the CEL was on I took it to Autozone and had them pull the code, they said it was the crankshaft position sensor. Well based on the symptoms the diagnosis made sense. I replaced the sensor and the car seemed to be running normally on the 30 minute test drive. The next day my wife drove to work and she said the same symptoms had come back. It has been several weeks since I replaced the sensor and the CEL has not come back on. I have seen several postings about the spark plugs and wires and that is my next step. BTW the car has 94k miles.
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I have a 2007 LS460 L. It has recently started losing electrical power in fraction of a second intervals. The map data sometimes works or displays an error on the screen. The radio has been functioning but now is also starting to flash off intermittently. Now when this happens it feels like the engine dies and ALL electrical is off and then power resumes. This affects steering, engine power and brakes. My wife drives this car and loved it until now.
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I have a 06 f250 king ranch with 6.0 . A few days ago my scangauge showed a code P0405
I changed my egr and after it showed two codes : P0405 and P0404
It still has a hesitation and loss of power , although better than before the Change.
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I have a 1992 k1500 5.0L. The pickup seems to run good, or at least better when it's cold and engine isn't to operating temp. But once it reaches temp it loses a noticeable amount of power, as well as has a "dead spot" in throttle response. From about 1/2 to 3/4 it's like nothing happens you push the pedal but no response. Only at about 3/4 once it down shifts then you get an increase in speed. So now back to power loss. It is bad enough that just to maintain a highway speed of 60mph it will downshift even on very small hills and on flat ground the pedal is about 3/4 of the way to the floor.
Some history: It has a rebuilt transmission in it with a 2000 rpm stall converter instead of stock(so two questions one when I re installed the kick down cable could I have adjusted it wrong and could this cause my issue, and what's the proper way to adjust? Second could the 2000 rpm stall converter cause any issues?)
It has a new distributor, cap, rotor, along with plugs and wires. I recently installed: knock sensor, map sensor, coolant temperature control sensor, tps sensor, egr valve, pcv valve, ecm, rebuilt the throttle body, as well as a few other things I'm probably forgetting.
I suspect the engine is running rich because the exhaust tail pipe has a lot of soot(it has no cat was that way when I bought it but it has way more soot than it should even with no cat.) I just checked fuel pressure and it's right at 11 to 12 psi. I haven't pulled plugs yet to confirm rich condition, but last time I changed them they were all black as coal.
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Once again my Celica is having a similar issue. Originally over 6 months ago i had an issue with my MAP Sensor which was causing extreme hesitation issues and the car was basically not safe to drive in traffic.
The issue that is now occurring is that i can start my car fine and drive around on flat normal roads with no issues but ive noticed once i go up a steep or decent hill/driveway the car will start to bog down around 1500-2100 RPM.
Once it starts to play up it continues to do so even on flat roads.
Have Checked:
- MAP Sensor - OK
- Distributor - OK
- Leads - Old but still ok, plan to replace later.
- Spark Plugs - Ok
- Spark Plug Wells - They had oil in them few weeks ago, cleaned out and hasent returned.
- Need to replace Valve cover gasket to fix this i believe.
- Fuel is ok.
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I drove my car to work today and no problems. Tonight my wife and I took the car out to go to dinner and intermitantly there and back my car is hesitating as we drive along. I thought it was odd at first then my wife asked if I was kidding around. I told her its not me.
It's as if the car is driving then all of a sudden its like a loss of power or as if the limiter kicks in and starved the engine of gas and then a second later it jerks back to life and keeps going.
If it does this tomorrow its going to the dealer. It is not throwing any warning lights and I have 3/4 tank of gas so its not that.
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My 2003 Camry loses power and starts to hesitate or miss-like under load, but when cruising along not under load it runs smooth. There is no check engine light coming on.
I have changed the fuel pump and fuel filter in the tank.
I have changed the spark plugs.
I have added injector cleaner and fuel treatment to the fuel.
I have cleaned the air filter and air filter compartment.
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Alright, my '06 SV6 AWD has a major problem...I'm about to blow it up! But seriously, I've had an issue for a few weeks now with intermittent acceleration/hesitation problems. Basically it started as a rare occurrence and is happening more often now. Yesterday, it did it consistently for 20 minutes on one trip around town. 1 hour later, it didn't happen noticeably at all on the way home. It happens while accelerating, usually from a stop, but also sometimes when cruising at highway speeds.
The car does not stall or stumble. Everything sounds fine and smooth, but when accelerating from a stop, the car will stop accelerating and the speed slowly drops off. Pushing the accelerator down further to the floor does nothing for several seconds, then the power returns and the car responds to whatever position the pedal is in. If you haven't pushed further it continues accelerating where you left off. If you've got it to the floor, it takes off quickly. When cruising at speed, you don't notice anything until you start slowing down, and the pedal reacts the same way. NOTE: The engine does not rev up when this is happening. It's not like the tranny is slipping.
It really seems like a fuel delivery problem and not transmission. It has all the normal symptoms of a failing pump. And about 2 months ago, I had the fuse for the fuel pump melt (not blow). These problems didn't happen immediately after, but they did happen a few weeks after that.
That said, I have noticed that when cruising I occasionally hear a light clunking noise that sounds like the rear diff engaging. I assume this is just due to play in the drive train. I also had to recently do the expensive versatrack fluid flush and fill to get rid of the diff groan. But I still feel like it's probably fuel related because the engine doesn't rev up.
Here's what I've done so far:
1. Checked the wires at the problematic C305 connector. I already had to completely redo that connector several years ago as the PO had removed the connector and directly twisted all wires together covered the with tape, and filled hole with silicon. BTW, GM does sell all of those harnesses with length of wire, connectors, and heat shrink covers for reasonable $$. Anyway, found 2 wires with insulation slightly shaved off. Neither was for the fuel pump, everything else still looked good.
2. Checked voltage at the gray fuel pump wire just after the new harness (about a foot before the fuel pump). And checked the ground at the same location. Haven't checked at pump connector because I don't want to drop tank just yet. Both were fine with almost no resistance on power between that location back to the fuse box. So, it doesn't look like a bad or shorted wire unless it is in that short length up to the fuel pump that I cannot access w/o dropping the tank.
3. Checked fuel pressure at the fuel rail. The pressure when primed and idling is a consistent 60-62 psi. I know the manual states 60psi as the max. Maybe this has something to do with it?? Perhaps my cheap actron pressure guage is a bit off or perhaps the pressure regulator is bad. Could this cause the issue.
4. Checked for DTC's with code reader. No active or pending codes.
The other things I think could be the cause based on internet research:
1. Accelerator Pedal Position (APP) sensor
2. Throttle Position Sensor (TPS)
3. PCM
4. O2 sensor
The problem is that all of those things tend to set a DTC from what I've read. I still think the fuel pump us going bad and the pressure was fine because the problem is intermittent. I just don't want to spend the $$ on a new pump to find out it was something else.
Tomorrow, I will have access to a scanner that can log 10 seconds of data from the computers while driving. I think that might shed some light if I can get the problem to happen when recording. I'm not familiar with fuel trims and the lot.
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