Misfire, shaking at cruising speed or low RPM, switching between ICE and Electric

well done!

 

Interesting! Is that the same problem covered by the recent TSB mentioned elsewhere within PC?

 

Did you try replacing the EGR valve?

 

So I have the same problem with my toyota aqua 2012 having 57000KM on ODO.
When ever the car is at at low rpm, like on a traffic light, and then i accelerate out of it, means while transition between battery and engine,-- i hear very grave sounds, shaking and rumbling, as if something is going to crack open in the engine. This happens only at low rpms. and i have no idea what this EGR is and where can i disconnect it to see what happens

 

it sounds like you need professional help.

 

It's almost certain that the EGR system and intake manifold are clogged. You'll want to check out mine and several others' posts in the Gen-3 maintenance forum.

Pixel XL ?

 

Here are a few threads:

Oil Catch Can, Eliminate that knock!

at 150k miles the egr valve cooler assembly should be cleaned

On page 8 I describe how to clean the intake manifold (with it off the car):
My Prius is down 4 quarts of oil 9000 miles after oil change

 

I have a similar story. Car started idling weird between the gas engine and the electric when I would be above 50 miles an hour in the cruise control I would have a weird nock And they got worse and worse eventually knocking when I was cruising at 30 mph. My 2010 Toyota Prius had the check engine light come on and it said cylinder three misfire. I had my mom and pop mechanic replace it. 20 miles later same problem. So I took it to the big boys at home and Toyota. I was Told by Toyota that I had gotten cheap spark plugs so they replaced all my spark plugs and the wires,
($400+) 20 miles later my check engine light came on again and the car was idling weird between 50 and 70 miles an hour. My water pump died which caused the yellow and red triangles of death pop up on my car. Took it to my local mechanic who couldn’t diagnose it. Took it back to Toyota who gave me a $6000 bill to replace everything that would be the fuel injector, the timing chain gasket cover, and the water pump three things for $6000.I had the work done it for $1200 by my mom and pop Mechanic and was sure my problems were over Check engine light came on again with the cylinder three misfire. Was told that it was a cracked cylinder in my engine getting a new engine would fix all my problems. $2800 and a 25,000 mile engine later I was super excited and 20 miles into it the check engine light came on again. I was defeated. I’ve read this article about disconnecting the EGR valve electric. That solved all my problems no more knock no more cylinder three misfire I spent well over $3000 and all I had to do was disconnected the EGR valve

 

Did you ever clean the complete EGR system, including the cooler (big item connected to the exhaust manifold)? And the intake manifold, especially the EGR passages?

 

Late to this thread... However, does unplugging the EGR wire throw a CEL? Seems awfully odd that it wouldn't....and seems like that would be a 'hole' in the emissions systems checking that the vehicle does.

 

I think functioning EGR function, besides helping with emissions, also helps the engine run cooler?

 

I'm having same issue but in a 2006 prius

 

Experiencing this exact issue. Lots of threads point to the egr & cooler being the cause. Has anyone simply replaced these two parts with new ones rather than trying to clean them to solve?

Additionally, can unplugging the egr cause other problems?

 

Having this problem currently and it’s getting worse. We’ve been chasing it down and ready to just unplug it. But how do you do that?

We have replaced spark plugs (helped for a bit), replaced EGR valve and pipe, cleaned MAF sensor, throttle body and intake manifold.

I can’t find a video or link anywhere on how to unplug it completely. Please advise.