Anybody know why this is capped off? California emissions thing?

I have been trying to reconnect the EGR that had been disconnected and plugged up by the previous owner(s). Wish I could delete it. But need it for emissions where I live. I think everything is connected properly now. Just can't figure out what those caps are for.

 

Have you tried passing the emissions test without the EGR? If it were mine, I'd put new plugs in, make sure the plug wires and the catalytic converter are good, give it a good Italian tune up, and run it through a buddy's shop while it's hot to see what it's doing. But then again, I have no idea what the emissions testing stations charge out there. Probably your first born son and a right arm.

 

Those two ports (if I am not mistaken) are for the Power Steering Idle-Up system. When connected, the Power Steering Idle-Up system raises up the idle speed when you are turning the steering wheel to help prevent stalling when turning and just taking off from a stop at the same time. Those ports don't do anything if you do not have Power Steering.

The EGR systems on these Trucks aren't that bad. Toyota designed the EFI system to work with the EGR from the beginning. Plus breathing in cleaner air is a good thing.

 

Thanks! Good to know. I'm actually glad my truck doesn't have power steering. Keep it simple!

I'm just concerned the EGR system causes carbon buildup and sludge? That's my reasoning to delete it if I can. Especially after looking at my throttle body and intake after ONLY 90K miles.
https://www.yotatech.com/forums/f116...-after-309458/

 

No, leave the EGR alone. That carbon buildup is caused by the PCV system. I haven't worked on a 22re, but the 3VZE also has a problem with sludge buildup in the plenum after, oh, 20 years or 200,000 miles. After carefully cleaning mine through a head gasket replacement, here's a picture of the EGR inlet tube about 15,000 miles later. The end of the tube where the EGR gases exit is spotless, but the ring of sludge is right next to the PCV inlet.

Deleting the EGR won't do anything to improve performance, and the higher combustion temperatures will probably shorten the life of the piston and head. More importantly, as old87yota points out, it's the air you (and the rest of us)are breathing that you're poisoning.