Sputtering at stop?

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Apr 25, 2015 | 11:31 AM

#31

Tom57

Pole Position

Joined: Mar 2008

Posts: 2,146

Likes: 70

From: Illinois

Quote:

Originally Posted by danielmew

Hi,

I have an 2004 LS430. The engine would shake and the idle speed would drop to 400 rpm. I live in Northern California so I don't believe it is weather related. It happens randomly with engine cold and warm. The car runs fine once the stop light turns green and I accelerate. I have not try to read any code yet. There are no service warning indicator from the car.

What mileage? Have you done anything to the engine recently? Retrieve MIL code(s) to avoid guessing.

Apr 27, 2015 | 08:50 PM

#32

LS430inDE.

Racer

Joined: Apr 2009

Posts: 1,358

Likes: 86

From: Delaware

Quote:

Originally Posted by Tom57

If this is the case, consider using an additive/cleaner like BG 9800 just before your oil change to help remove sludge and varnish deposits. Add to oil, run engine for 45 minutes, then drain and re-fill oil and change filter. Lexus dealers use BG products on high-mileage cars.

The knowledge on this board and this thread is blowing my mind! Tom------is that really 45 minutes or is it a typo and should be 4-5 minutes? 45 minutes with an engine cleaner seems like a reeeeally long time to me. And here we were on the other thread discussing which oil is "the best". LOL