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Lexus 4GR-FSE Engine Carbon Build-up (merged threads)

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Old 05-13-10, 08:46 PM   #61
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Quote:
Originally Posted by trixxx519 View Post
what if my 3year warranty is over?
Car should have 4 year warranty.
My bad, not 5 year haha
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Old 05-13-10, 09:07 PM   #62
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thanks.. i have the same exact problems and im around 40K.. im going to schedule an appt!
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Old 05-14-10, 12:14 AM   #63
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Originally Posted by stonefan52 View Post
Car should have 5 year warranty.
i really dunno about these stuff, it would be great if its 5years
but i tho it was 3years, and then you can extend it?
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Old 05-14-10, 06:17 AM   #64
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i use chevron with techron premium. there is always going to a bit of a vibration, but it's sooo much better now. we will wait to see if it tries to stall anymore.
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Old 05-14-10, 06:42 AM   #65
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Quote:
Originally Posted by trixxx519 View Post
i really dunno about these stuff, it would be great if its 5years
but i tho it was 3years, and then you can extend it?
To clarify- you're both wrong.

A new Lexus has a -4- year warranty bumper to bumper, and 6 years on the powertrain (engine/transmission mainly).

This ought to be covered under either if the problem is carbon build-up in the engine.

(mileage limits respectively are 50,000 miles and 70,000 miles)


USED but certified Lexus vehicles have a 3 year warranty from date of used sale (up to 100k miles).

You can buy the Lexus extended warranty on any Lexus that is still in its original 4 yr/50k mile warranty period.



Oh, and the brand of gas you use won't make a difference... from everything I've read so far it's a problem with the design of the DI-only engine... which is why 350s don't have this problem.
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Old 05-14-10, 07:23 AM   #66
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^^ Kurtz is 100% about the warranty and the gas, carbon build-up is just a normal thing in engines...

I am not too familiar about carbon build-up on these DI engines, but I do know that if it gets bad enough to get on the throttle body, you will get a slightly rougher and lower idle (really bad on Toyota 4-cyl engines)...as soon as we do an upper induction service and clean the throttle body, problem gone...

Now don't get too overboard with this service...if it isn't covered under warranty, it could be $100 or more at a dealership...and if you plan on doing it yourself, if done wrong you can hydrolock your engine...
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Old 05-14-10, 08:43 AM   #67
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blah blah blah with the hydrolocking.

throw some seafoam in the brakebooster line and you're good to go. you don't need to pay a lot of money to fix a simple problem.
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Old 05-14-10, 09:34 AM   #68
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throw in a can of seafoam in the tank
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Old 05-14-10, 09:38 AM   #69
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Or use water instead of seaform for the vacuum lines. Put your favorite fuel injector cleaner into the gas tank.
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Old 05-14-10, 10:04 AM   #70
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Another thread about the carbon build up
http://www.clublexus.com/forums/is-s...-build-up.html
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Old 05-14-10, 10:29 AM   #71
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Quote:
Originally Posted by shui3000 View Post
blah blah blah with the hydrolocking.

throw some seafoam in the brakebooster line and you're good to go. you don't need to pay a lot of money to fix a simple problem.
BLAH BLAH BLAH until you hydrolock your engine...

I am trying to give good advise, not bad advise like just throwing a can of seafoam into the vacuum line...if you add any induction cleaning product too fast, you will hydrolock the engine...seafoam's own website warns people about adding it too fast, check it out...

easily done yourself, just be careful...
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Old 05-14-10, 10:49 AM   #72
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having the exact same problem..im in South Africa,my lexus dealer said "no fault found" when i took the car in..car has about 80000km on it..
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Old 05-14-10, 12:13 PM   #73
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Being that this is a fuel problem isn't there an emissions’ warranty? If I’m not mistaken it’s a longer warranty! Also being that this is clearly a design problem it should be actionable. Toyota doesn't need any more warranty issues!

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Old 05-14-10, 01:18 PM   #74
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Quote:
Originally Posted by Koz View Post
Being that this is a fuel problem isn't there an emissionsí warranty? If Iím not mistaken itís a longer warranty! Also being that this is clearly a design problem it should be actionable. Toyota doesn't need any more warranty issues!

Koz
exactly! the tech clearly said it's a design issue. lexus/toyota can't afford anymore issues right now or ever for that matter.
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Old 05-14-10, 01:40 PM   #75
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Quote:
Originally Posted by Koz View Post
Being that this is a fuel problem isn't there an emissionsí warranty? If Iím not mistaken itís a longer warranty! Also being that this is clearly a design problem it should be actionable. Toyota doesn't need any more warranty issues!

Koz
The emissions warranty isn't much longer than the powertrain one (8 years/80k miles versus 6 years/70k miles), and would have nothing to do with this issue since this has nothing to do with emissions.
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