Awesome pictures! Colorado Land Cruisers is based out of Colorado Springs, but I'm sure there's something up near Denver though.
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If a Ram on swampers got stuck, is it really a moderate trail?
You changed a VSV?
Was this the VSV under the manifold?
The 2 vacuum hoses from the throttle body, pull off the hoses and shoot carb cleaner or brake cleaner through the metal vacuum hose nipples. This would remove the PCV crud that can plug the small vacuum orifice(s) inside the valve body.
There is a fiber filter under the inside of the EGR vacuum modulator (small cap on top) cap, that can be cleaned. Just pull off the small cap take out the fiber disk and run under the faucet. When you put it back, you can change the position of the filter to a clean area.
Also, clean the EGR temp sensor. It develops a hard to remove baked on coating that creates false temp readings (lends itself to egr flow) Usually requires a wire wheel to clean. If you have a vacuum tool, you can exercise the EGR valve, Or find a vacuum port on the engine with strong constant constant vacuum and connect directly to the EGR valve. This will move the pintel valve in the EGR in/out. The engine will misfire or die. Also a good sign its working correctly. I've worked on several rigs with the p0401 code. The most likely culprit is the VSV. However, depending on how long the VSV was not working, would cause a build up in the EGR valve. Using a hand vacuum tool or mitivac tool or strong engine vacuum from another hose will force the EGR valve to open/close. Least likely; there are a lot of other vacuum hoses. There might be a secondary leak in ERG vacuum circuit.
Un-related:
When you swapped the radiator, did you replace with toyota red coolant, or after market red (supports Toyota) coolant? It needs to be the red stuff.
Don’t forget to drain the engine block. Great photos. It’s there a meaning on the funny truck name “Chungus”
Interesting. They're advertised as a lifetime fix, this isn't the case?I'd return the silicone PHH and get a good rubber one. That's a job you only want to do once, and the silicone ones are known to develop small leaks after a couple years.
Sorry if I opened a can of worms