ivanez

Hello,
AFIK 2nd gen IS engine design is flawed and can build up carbon easier than newer ones. I read some time ago that revving it up hard for a few seconds can burn up the carbon and kind of remedy the problem. I have done it a few times in the last 1-2 months.
However, once I get in the red zone RPMs like 7k+ the car starts shaking. I know that’s why it is red and it is a bit of an extreme but is that expected or should I be worried that this is an early sign that something might wrong with my engine?

2013FSport

iTrader: (2)

Are you driving it or parked? It sounds like the later but I wish to confirm.

2013FSport

iTrader: (2)

For the record: carbon build up on the intake impacts all DI engines except those with DI & PI (D4S) like the 2GR-FSE (350).

ivanez

yeah, parked. Sorry should have mentioned initially

2013FSport

iTrader: (2)

Static revs to redline will not help remove carbon and could damage the engine. I would not advise this at all!!! Pulling RPM while traveling up a long steep hill under load while keeping the RPM above 5k is far more helpful. If the engine is DI only, 250/300, port cleaning if needed requires mechanical assistance like wallnut blasting.

Again, static revs do little for carbon removal as there is no load and the fuel trims are whacky, as is the ignition advance. It really serves no purpose other than stressing the mechanical limits of the reciprocating components.

s3v3n

iTrader: (3)

And how can he reach 7K rpm? Unless your ecu is tuned, you can never hit 7K rpm. I believe 6500 rpm it will start to bounce so the shaking that you're experiencing might be the rev limiter bouncing. Please refrain from doing this when parked.

2013FSport

iTrader: (2)

Agreed.... well mostly. When pulling under load, it will limit it. If the engine is accelerated hard enough, it will exceed the limit and go right past it.

Something akin to selecting to low of gear when downshifting. The electronics limit fuel and ignition. The mass of the car can easily exceed the engines rev limit.

MikeFig82

iTrader: (13)

The car is shaking probably due to carbon build up.

Follow the instructions to really see if you get any Cel lights to pop up.

Instructions are around mid page:
https://www.clublexus.com/how-tos/a/...mize-it-367282

2013FSport

iTrader: (2)

Nice find Mike!
Tag: JJD952

Bichon

I'm with s3v3n on this. Shaking when revving to red line with the car in neutral or park is probably just the engine bouncing off the rev limiter. I also agree with him that doing so is a bad idea.