[JRCARNUT]

I'm new to tundrasolutions.com and I found this forum because I was looking for some information regarding "Insufficient EGR Flow" (read by the ODB II) for my 4-cyl 1997 Camry. The information I found here was extremely useful, specially what parts (there are 3, i.e., EGR Valve, VSV, and EGR Modulator) usually go bad.

I want to share some additional information for those that might run into this problem. Like the forum said, the problem is typically the VSV or the EGR Modulator or both. The Modulator is a piece-of-cake to replace but the VSV is another story if you don't know the tricks. Here are some tips:
1. I started with the VSV
2. Jack up the right front of the car; remove the right front wheel; use jack-stands.
3. Once the wheel is off, with a flashlight, look behind the engine, RIGHT ABOVE the engine support. It is very easy to see. It has a blue electrical clip which you can easily pinch the plastic clip to release/pull.
4. If in doubt, crawl underneath the car and follow the two small hoses that come from the EGR Modulator and it will lead you to the VSV. However, from underneath the car, you cannot see the VSV.
5. BEFORE YOUR START to put your arm through the tight space, find all the sharp clamps, corners, bolts, etc. that your arm might scrape against. Use some tape, rag, or any material you can use to temporarily cover the sharp edges. This will save your arm/skin from a lot of cuts and scrapes.
6. You will need a 12mm socket or wrench but here's the tirck. The bolt is fairly tight and you can easily strip the corners and before you know it, your socket or wrench will no longer work/catch. As soon as I felt this was starting to happen, I used my air-rachet (was a little tricky getting it in the tight space to make sure the socket was well-seated on the bolt) and the bolt came off very easily. Not as powerful, an air-rachet has a similar rotating action as an impact wrench and it works great! If for some reason you drop the bolt on the engine support, you will need to use a telescopic magnet.
7. I mounted the new VSV with the same bolt but I used a lock washer so I did not have to make it too tight but certain enough that it will not come loose
8. I reset the ODB code but the check engine came back on again.
9. I replaced the EGR Modulator and all ODB codes were cleared. Problem solved! The car passed inspection.
Thanks to all that have posted information on how to fix this problem. Hope my additional tips will be useful to someone.
Jesse