2.7L VSV Vacuum line help

Sooooo....I was replacing the VSV on my 2002 Tacoma 2.7L and thought "I should mark those vacuum lines" and while I was disconnecting the electrical connection they popped off. Does anyone have a second to trace their lines and let me know which one to hook up to which port? Thanks! Also, I've looked in the FSM and couldn't find any specific connection info. It looks like one goes to the ERG and the other to a port on the manifold.

 

Do you have the vacuum diagram sticker on the underside of the hood?

 

The taller vacuum barb closest to the solenoid is the one that goes towards the EGR. Outer shorter one to manifold.

 

Awesome, thanks so much. Got it hooked back up. What a PITA!

 

Nice man, that Aisin vsv is a steal huh? Like 30 bucks or something? I bought one like 9-10 months ago and they were 50 bucks, still like half of the Toyota badged Aisin equivalent.

 

Great idea, I didn't even see that on my hood. I ended up following the advice of GPsevinSixx and it ended up being wrong. 100 miles later and my code came back on. I tested things exhaustively then looked at the diagram and I had it hooked up backwards. Duh!

 

Sorry OP, should always follow the diagram on the hood. DR z even posted that before me.

 

No worries, my fault! Thanks

 

You may not be out of the woods yet. It shouldn't matter if you just had the 2 vacuum lines switched at the VSV. The switch should stop or allow the air flow in either direction.

EGR problems can be a pain to track down. Could be VSV, modulator diaphragm leaking, or clogged passages.

 

Dr Z is correct. It shouldn't matter which line connects to which vacuum line on the VSV since it is just acting like a switch that opens and closes a connection.

 

I did make a difference some how with the vacuum modulator. Testing for vacuum on port q while revving the engine with the line reversed to the vsv produced no vacuum, a sign of a faulty modulator. Hooking them back up as shown on the vacuum diagram, and testing port q, I now get vacuum while revving.

What a pain. I've cleaned the ERG, cleaned and tested the ERG temp sensor, checked the VSV and have done some vacuum diagnostics. Next step is checking the ECM

 

I can confirm, EGR is PITA to find what's wrong. I had 2001 Sienna with "Small leak" code popping up every year or so. After resetting, the code was not there for many months. Few years later the code decided to stay, just before I was due for smog check (CA thing). After many hours of checking we finally found a cracked membrane inside the canister. We found it by running full test on canister ("blow here, close this pipe, the air should be escaping here"). It was not like it should by the book, so we crack open the canister (not repairable) it confirmed the cracked membrane valve. After replacing the canister the "small leak" went away forever. It was the only PITA with that Sienna (we loved it but sold it in 2014 to make room for 4Runner).

 

Canister, meaning the EGR modulator?

 

Meaning "charcoal canister". Sorry, I did mean "EVAP as whole is PITA". In Sienna charcoal canister has whole bunch of pipes coming in and out and they have funny combination of flow as some pipes control membrane type valves closing or opening other pipes.



There are 3 more tests like that.

 

Oh oh, gotcha.

 

But it sounds like the OP was replacing the VSV for the EGR system, not the VSV for the EVAP system. Both systems can be a PITA to diagnosis because of small leaks or clogs.

 

Sorry, my bad. My troubles with Sienna made me thinking about VSV for EVAP (I replaced that one unnecessary).
I'll shut up now .