2010 Prius Engine Shaking / Engine Vibration

Motor mount?

 

dirty throttle body and intake manifold or need oem plugs

 

injectors?

 

I would suspect it to be the spark plugs if it wasn't doing that before. I would check if the spark plugs were put in properly and gapped. Also make sure it's Denso or NGK spark plugs, the Prius engine's are sensitive.

 

Bob, forget the (recently replaced) spark plugs; this is likely your problem: Prius III engine knocking at high torque low RPM (solved) | PriusChat

 

That person had a blocked gasket on the EGR pipe, totally different issue. Unless he has a modified blocked gasket on that return end. Whoever replaced the EGR pipe gasket on his car, replaced it with a modified one. That gasket is normally open for the EGR. I mean you can try cleaning the EGR pipe and see if the vibration goes away. If not, then you know that problem is something else.

 

No, you got it wrong. The previous owner blocked the EGR to stop the knocking, but the blocking plate ruptured causing knocking again. The knocking is actually caused by dirty intake manifold causing all the EGR gases going into the first cylinder causing misfiring. Cleaning the IM fixes the issue. Blocking the EGR fixes it too, but the expense of MPG loss and hotter cylinders (burned valves).

 

Ah, I guess I misread the op about his issues then. Thanks for the clarification.

 

That EGR's getting to be a real damned if you do, damned if you don't thing.

 

Lol... That's why there's a maintenance for that. I haven't done it yet but will be doing it soon. Gotta find a day to video it.

 

Look forward to that. More than doing it myself for sure, lol. The worst bear appears to be the component right at the exhaust manifold. One member got it off, and the interior was a carbonized disaster, he ended buying a slightly used one and replacing it, impossible to clean the interior. It has four coolant hoses hooked up, and in tight quarters.

 

You don't happen to have a picture of it do you?

 

I made some notes. The first thing on this list is the sub-assembly with the coolant hoses, first inline from exhaust manifold. I think on ebay they'll usually sell the whole thing, that plus the valve assy:

EGR components:
PIPE SUB-ASSY, EGR W/COOLER p/n: 25601-37010
VALVE ASSY, EGR p/n: 25620-37110
website for above:
2010 Toyota Prius Exhaust Gas Recirculation System

Here's some decent pictures. The top listing just the sub-assembly, and the second one is the whole unit:

eBay

All the above are used, some not clearly described as such, and I do not know: miles is what clogs these, so used might be a crap shoot. Here's new, item 7 on this page:

EGR SYSTEM for 2010 Toyota Prius

Not that much more than Ebay, either.

I'll attach too, what I found in the repair manual.

 

the gen 2 used valve overlapping for the EGR operation, so no EGR piping, valves, and problems.
toyota removed the VVT from one of the cams in the gen 3, so you have to use dedicated EGR system that plugs up just like any other ICE with dedicated EGR system.
not sure why they did that, but must have been some efficiency gain, maybe more EGR doable that way?

 

I actually purchased the whole unit from ebay when one of the sellers decreased the price. I paid $112 shipped. I made sure i got one with the newer, revised EGR valve (per the TSB on EGR). sadly i had no chance to take it apart and see the condition inside the valve. looks fairly clean from outside.