LS 460 Acceleration Problems
10-13-17, 09:45 AM
#106
Edit: here ya go...
https://techinfo.snapon.com/TIS/term...spx?action=new
$15 for 2 days, maybe it might be worth it to try myself...
Figure if I can get access to the firmware, I would buy the device so I can apply it, $85 vs $100+ and I own the device. It's a nice dream anyway.
Last edited by DavidinCT; 10-13-17 at 10:27 AM.
01-18-18, 11:59 AM
#107
Driver School Candidate
#metoo
Well guys I just experienced this phenomenon on my ’07 with 115K. Got my oil changed Friday (Jan 12) at Hendrick Lexus (full syn 0W20) and noticed hesitation on acceleration right after - same thing all the others have described. Initially, I was freaked out and started researching. Many suggested getting the ECM updated/reflashed. I called Lexus and asked about history on software updates on the car and was told it has not been done. Asked for the price and he could not quote me, just said I need to bring it in and have it diagnosed first for $139. Anyway, after a few days of driving, the issue is virtually gone. The car is back to accelerating like the rocket ship it is with no hesitation. So bizarre. I’m wondering if I should still get the ECM update.
Last edited by djkneekap; 01-18-18 at 12:06 PM. Reason: add mileage
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DrQuality (08-05-21)
01-30-18, 07:27 AM
#108
Driver School Candidate
Can you tell me the procedure you followed with the Toyota Oil System Cleaner? This is my next step before looking into getting the ECM reflash. Just had an oil change at Lexus a few weeks back and experiencing hesitation now. Very frustrating...
01-30-18, 02:26 PM
#109
Lexus Fanatic
01-30-18, 03:28 PM
#110
Lexus Fanatic
Lubro Molly makes a very similar product, you put it in right before a oil change, run the engine, and then change the oil.
https://products.liqui-moly.us/pro-l...e-flush-2.html
https://www.ecstuning.com/b-liqui_mo...Moly-ES3184220
https://products.liqui-moly.us/pro-l...e-flush-2.html
https://www.ecstuning.com/b-liqui_mo...Moly-ES3184220
Last edited by UDel; 01-30-18 at 03:33 PM.
02-01-18, 01:25 PM
#111
Driver School Candidate
Thanks fellas. I'll have to try the alternative to the Toyota product. My local dealership doesn't carry it and the guy I spoke with says he's never heard of it.
02-01-18, 04:14 PM
#112
Lexus Fanatic
My local dealership doesn't carry it and the guy I spoke with says he's never heard of it.
Royal Purple, Liquimoly and others make a product similar to Toyota's.
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djkneekap (02-02-18)
05-03-18, 07:35 AM
#113
Driver School Candidate
Ls 4th gen
1. Check the oil dipstick, it may not be seated correctly.
2. It is possible, the engine was started at oil change with dip stick rem
oved, or not seated.
either of these would be perceived by the Ecu as a large evap leak. It should throw a code, but, with the electronics on these cars, you never know. Sometimes, in my career, we look for something big, and find something small.
05-03-18, 07:59 AM
#114
Driver School Candidate
Ls
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 noticable 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 cylindar 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.
Can any members share some light on this problem. I find it very strange that the problem each time manifested itself right after a routine service.
All was well till last month, when again right after a service, the car hesitated and totally lacked power , most noticable 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 cylindar 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.
Can any members share some light on this problem. I find it very strange that the problem each time manifested itself right after a routine service.
05-10-18, 08:25 AM
#115
Driver School Candidate
You have not driven my rx, it was miserable in every mode, the dealer could not fix it.the module did, it is now as smooth as an ls, and runs like a striped ape. If you had an understanding of how the electronics actually work you wouldn’t freak out over a little aftermarket tuning. The engine management computer only controls engine timing, fuel mixture, and cooling fans. All other parameters are locked in and can not be changed by any thing. All those “gizmos” are controlled by the chassis computer. That is not what we are dealing with.it is NOT a placebo effect.trans is controlled by a separate module.In my shop I have seen many vehicles with similar issues. The firs was a new 1994 chevy truck, exact same symptoms,service manager at chevy was an old friend, he pulled the ecm, installed hyper tech chip, billed. Chevy for an a/c compressor, customer was very happy. We did this on lots of vehicles at my shop. Never had a problem. But you know, ignorance is bliss.
05-10-18, 08:27 AM
#116
Driver School Candidate
You have not driven my rx, it was miserable in every mode, the dealer could not fix it.the module did, it is now as smooth as an ls, and runs like a striped ape. If you had an understanding of how the electronics actually work you wouldn’t freak out over a little aftermarket tuning. The engine management computer only controls engine timing, fuel mixture, and cooling fans. All other parameters are locked in and can not be changed by any thing. All those “gizmos” are controlled by the chassis computer. That is not what we are dealing with.it is NOT a placebo effect.trans is controlled by a separate module.In my shop I have seen many vehicles with similar issues. The firs was a new 1994 chevy truck, exact same symptoms,service manager at chevy was an old friend, he pulled the ecm, installed hyper tech chip, billed. Chevy for an a/c compressor, customer was very happy. We did this on lots of vehicles at my shop. Never had a problem. But you know, ignorance is bliss.
05-14-18, 08:15 PM
#117
$60k car and risking it with a 79 circuit ....now way....again read link closely.....incredible how folks will go for things that are cheap fixes and then feel to humbled later to admit scam.....same thing happens with the so called chips that save mpg when folks afe desperate....http://www.performancechipreviews.co...formance-chip/
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mathyewgt (09-27-20)
04-25-20, 08:21 PM
#119
I had this issue after the first oil change after getting my 07. Did the oil flush as noted above and i do it during every change. Also had the dealer update the firmware think the trans had an update too. In the last 4 years have not had that issue.
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DrQuality (08-05-21)
04-27-20, 08:10 AM
#120
Driver School Candidate
