Reddit mentions: The best automotive egr valve vacuum solenoids

It's the 4-cylinder. The original parts were Denso, but I'm pretty confident that I got the correct Dorman parts. It's a '99 Camry LE L4. EGR Valve, Modulator, VSV. None of the vacuum hose in the VSV/EGR/Modulator system is clogged. I actually checked the 5 or 6 hoses while I was replacing everything. I also sprayed some Gumout Carb Cleaner into into the intake when I took the EGR off. Cleaned the EGR pipe too.

This is the scanner I'm using. I'm also using the Torque app on my phone. As you can see, it offers some nice monitoring. I glanced at that Vacuum Boost graph while I was driving and I think I remember it sitting at around 15 when I was idling and dropping to 3 or 4 once I got going. I didn't check out the O2 graphs though. I'll log some graphs tomorrow and do some real testing.

Thanks so much for your awesome response. Troubleshooting this has been so frustrating and you've given me something to do.

The second one is the correct solenoid for the VDI solenoid.

You want this

It’s a cheap knockoff but I’ve got two in my car and they’re still going strong after a year.

This is located in a bank of solenoids with two others mounted to the back of the upper intake manifold (between the UIM and the fireball). The easiest way to get to it is to remove the UIM. It’s not hard (I can do it in about 10 minutes) but there’s a lot of small bits to remove to get there.

https://www.amazon.com/ACDelco-214-329-Original-Equipment-Solenoid/dp/B000C9LPEO/ref=pd_sbs_263_t_1/143-6768378-7206021?_encoding=UTF8&pd_rd_i=B000C9LPEO&pd_rd_r=54dbbf33-ee4c-4617-bdbb-ad21f28b4aa9&pd_rd_w=sbf4x&pd_rd_wg=0aLio&pf_rd_p=5cfcfe89-300f-47d2-b1ad-a4e27203a02a&pf_rd_r=9F4J60G1XS5RGK0NK68Q&psc=1&refRID=9F4J60G1XS5RGK0NK68Q