2011 Prius engine shaking, knocking violently

Cleaners (even name brand) only do so much.

Pressure washer will get the job done toot sweet.

Good luck and keep us posted .

 

Acetone works good too

 

I'd prefer a mildy caustic water-based solution to acetone though, any day of the week. Oxi does react with carbon, and slow but sure will bubble it clean. Unlike acetone, you can work in the laundry sink, without stinking up the house, maybe drifting off.

I do have a can of acetone kicking around. First thing I did when I got it was take the #$@*! plastic security ring (or whatever the heck it's called) off the actual steel cap: if anything it made it more spill-prone.

 

Think you can use water from the tap under pressure and save the emotional debate.

Give it a shot and you’ll see.

 

At the rate I'm piling on the miles (not) there may never be an encore.

 

I’ll have a dirty one in a couple of weeks you can practice on.

Do you have a pressure washer in your tool backlog?

Let us know if you ever want to part with the garage queen.

 

Just reporting in...the car is running great after the initial startup from cleaning the intake, EGR cooler and valve. The startup consisted of tons of bucking and the engine dying at idle for 2 minutes.
I then just decided to drive it to work any excess moisture out...and the car has been fine the past 250 miles now.

The EGR cooler and valve cleaning took care of my bucking issue on startup for now!

How'd things work for you OP?

 

Unfortunately this Isnt still enough data for Bill Norton.

 

We just need more people to report back.

But that is a different mountain to climb .

 

lol, who is Bill Norton?

 

Sorry, not a mountain I care to climb.

Pixel XL ?

 

I try to be as friendly and helpful as possible, hoping a pleasant experience will lead to reports of the outcome.

But not always the case.

I’m an eternal optimist though.

 

A member here who says that what you just did was a poor use of your time.

 

Knocking came back on mine after 15 months since the first time it happened, knocked about 2 seconds at work on cold soak today. Drove about an hour at 55 mph & was parked it in temps of mid 50s. 7 hours later, knocks from cold soak start up. Never turned engine off ever during ICE warm up under my ownership. Can't wait to put poor use of time to it

 

And just think others are willing to help use their time to help you “waste” yours.

The end of the month is looking better since the wife’s business trip is getting postponed .

 

Doesn't Toyota have a TSB for this issue? Last I read, they change the intake manifold, but that may be different now

 

I think the intake manifold revision changes the EGR, from:

One large passage that feeds into four narrow.

To:

One large passage that feeds into two intermediate that (both) feed into two narrow.

Somewhat speculative, did see some pics though.

I've also read that it didn't make that much difference.