I bought a 2013 Prius two last weekend, and on the way home I kept getting this shaking in the engine. I am new to Prius, so I thought it may be something where it is switching between EV and ICE. It would go away with acceleration or letting of the gas pedal. I have read several threads about this being an EGR issue. So yesterday I dove in removing the Intake and the Pipe from the EGR valve to the Intake. i cleaned them both thoroughly. I noticed that the small holes that allow the EGR gases to flow into the intake were almost completely clogged. The pipe was not so bad, but cleaned it anyway. I am pleased to say it runs great now, no more shaking when driving. Thank you so much for a great site, and all of the input. Very Happy Prius Owner!
The simplest way to see where you're at, is to check the degree of carbon build up in the EGR pipe, a stainless steel connecting pipe between the EGR valve and intake manifold. Watch @NutzAboutBolts video #16 here: Nutz About Bolts Prius Maintenance Videos | PriusChat Two or three other videos linked there too, for the full cleaning of the intake manifold, full EGR clean, and Oil Catch Can install. Good thread: EGR & Intake Manifold Clean Results | PriusChat Another: Oil Catch Can, Eliminate that knock! | PriusChat Some tools worth having: E8 Torx socket (mandatory) E6 Torx socket (optional, but good to have, to remove the throttle body studs from intake manifold) 3/8" ratchet wrench, regular and long handle, flex head, you can never have enough (or 1/2 plus reducer) 1/4" ratchet wrench, or 3/8" to 1/4" reducer Ratchet extensions: you can never have enough Long needle nose piers, straight and bent tip Ratcheting 12mm box wrench (optional, but makes disconnection of the EGR cooler from exhaust easier) Torque wrench (3/8" and 1/4" both good to have) Floor jack and safety stands (or ramps): basically some method to raise front, if you need to take underpanel off, which you may need to, both for access and to recover dropped items.
Will do that the next round of maintenance. The Pipe from the EGR to intake was not too bad. But I will for sure get it all cleaned up. Thank you for the reply Thank you Thank you for the great info, I will gather those supplies before tackling the EGR cleaning.
