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LS460 2011 noisy pinging at low rpm

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Old 03-16-14, 09:23 AM   #61
jharville1
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I have replaced many cylinder heads on those models for the hesitation and lack of power issue under light acceleration. The valve guides are worn and valves "vibrate" thus causing the knock sensor to retard timing and cause loss of power. Also knocking on cold start is from piston design. They made the piston skirt shorter which casuses less friction but also smacks around a little until fully heated.
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Old 03-16-14, 09:53 AM   #62
jmcraney
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Quote:
Originally Posted by jharville1 View Post
They made the piston skirt shorter which casuses less friction but also smacks around a little until fully heated.
Is "smacks around a little" synonymous with piston slap or is that a different condition?
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Old 03-16-14, 10:22 AM   #63
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Originally Posted by jharville1 View Post
I have replaced many cylinder heads on those models for the hesitation and lack of power issue under light acceleration. The valve guides are worn and valves "vibrate" thus causing the knock sensor to retard timing and cause loss of power. Also knocking on cold start is from piston design. They made the piston skirt shorter which casuses less friction but also smacks around a little until fully heated.
I have none of those symptoms on my LS-460. It's just a "ticking" noise that has been explained to me to be from the high pressure fuel injection system. I have no unusual noises during start up, and my car accelerates nicely most the time. I have noticed a bit of hesitation but have decided that's probably due to the fact I use REGULAR FUEL and NOT PREMIUM. When I floor the car it will fly and fly quickly. I like Lexus service, have had several and what I have decided is if I am going to continue driving a Lexus, make sure it's under the Lexus Platinum Extended Warranty. Lexus needs to get their act together and fix some of these irritating "bugs".
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Old 03-16-14, 10:22 AM
 
 
 
 
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2010, 2011, 460, belt, box, fan, lexus, low, ls, ls460, ls460l, noise, pinging, rest, rpm, speed, timing

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