2010 EGR Valve, Pipe, and misfiring

So you cleaned everything except the intake manifold and the egr cooler?

What level of deposits did you find?

How did the plugs look?

Everything is tight and no electrical connections are loose and all are securely fastened?

Until the whole circuit is cleaned, the weakest links are still present .

Good luck and keep us posted .

 

It’ll need to be separately cleaned and not just sprayed.

How many miles on your Prius?

Good luck with the next steps.

 

Spraying stuff in is kinda fuitle, and could mess up the MAF, depending on where you spray. As @Raytheeagle said, you need to dive in, clean the whole thing, after removal. Some boilerplate, and attachements:

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

Somewhat 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
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.

 

You must have all of this saved and readily available.

Comes in handy.

 

Nope, typed it all. Honest...

 

I don't believe cleaning the EGR pipe and valve would cause a misfire after cleaning. What connections did you clean with the carb cleaner?

 

I see you are an organizer of files too.

We have a desktop at the house and it certainly allows for good record keeping. But since I’m on my iPhone almost exclusively, I have a lot of safari windows opened.

2 are Prius Chat windows so searching and adding links is easier for placement into the commenting thread .