Read my v8 Evap results - Are they correct?

Hose is probably routed incorrectly, bad solenoid, or bad canister. Did you use the canister from the tundra or the 4runner the engine came off of?

edit: see post #8

http://www.toyotanation.com/forum/78-4runner-lounge/140285-evap-code-po446.html

 

See 1st post.

 

by old style you mean the 1st gen tacoma correct? Have you tried the 4runner like I suggested? If you feel there is a leak did you do a smoke test?

 

Yes, 1st Gen, I have the 4runner one, but I was told this one will work, and would like to exhaust all options here vs swapping everything yo rear mount EVAP box. I don't have a smoke tester.

 

1st things 1st, I would do an inspection of all emissions components. In the FSM there is a section that details how to inspect all the components. If you're using the original tacoma parts user the FSM for the tacoma, same goes for all 4runner/Tundra components. I would start there. If all of your components check out and are within operating range of what the FSM specifies next would be to build out a smoker to look for leaks. Youtube can help with that.

 

it would be easy to make a tester. (I saw on youtube after I hired mine smoked, a little smoke, pressure and a 9V battery to open valves while looking underneath) if you're correct that the system you have is compatible, you could just have a small leak and change things for no gain.
JMO but these systems create so much headache for sooo little reduction in escaped fumes it's ridiculous. From what '73 we had a hose back to the tank? Should have been enough since the tank gets opened so often anyway.

 

To me it's the vent valve circuit, I would repeat the tests with the vent valve circuit blocked from the cannister and see what the values are.

Your wording is different than the Licensed Canadian TechStream I use for these tests but the numbers and status of valves seem to be the same.

 

Yes, 1st Gen, I have the 4runner one, but I was told this one will work, and would like to exhaust all options here vs swapping everything yo rear mount EVAP box. I don't have a smoke tester.

 

I'm starting to.lean towards maybe the EVAP box has some sort of check valves built it to it ( the round things on top). When I compare the old box to the newer style, the new style seems very simple. Large area for charcoal, a close canister valve, a purge valve, tank line. The vapor pressure sensor is mounted on the tank in the newer stuff.

The trouble I'm having is knowing exactly how the older style box allows air to flow, and what compartments lead to others.

When I remove the gas cap to fill the truck, I hear a bunch of air escaping from the fill neck. To me this seems normal, except for how much air is coming out.


One thing that I'm not sure about is, when I enter into an active test to control the canister close valve (ccv) I can turn it on (close) and off (open). When it's on, it will stay closed for 5 seconds or so, then open, and close right back. I had been assuming this was normal, and was opening because the program was commanding it.... Sound right?

 

that is what i read on the 4runners canistor.