This is a EVAP canister from a 1999 Integra LS. I know the 2 vacuum lines on the left one goes to the fuel tank from the fire wall and the other connects to the engine block. The 3rd one tho i don't know where it supposed to connect to. Is it just a vent?

The car its going into is a 96 Civic DX with a LS Motor.


Thanks

 

ttt

 

It goes to the 3way valve... http://www.acuraautomotiveparts.org/...ystemcomp=List All&vinnoT=&trim=&trans=&view=normal 94

 

How important is the 3 way valve? can i get a CEL if i don't plug the hose into one?



Thanks for the help!

 

Not sure, it is part of the emissions system so I assume it would throw a CEL if not working, but again I am not sure, maybe somone else can chime in. 94

 

Put in a obd1 ecu. It won't throw a code.

 

The 3-way valve is the main control valve for the OBD-II EVAP system's diagnostics. If it is disconnected, electrically or mechanically, the ECM will complain loudly (which is a figurative way of saying that you will "get a CEL").

 

Ah ok so it goes to the 3 way valve. and from the 3 way valve where does it go?

Dumps into the atmosphere?

 

it goes to the vent valve that drains behind the subframe.

why not reuse your stock canister?

 

From my understanding i cant use the stock canister because the 96 civic DX's Canister doesn't have a EVAP control Canister Vent Shut Valve. So that's why i'm getting a CEL P1457.

 

why not just find a 96-97 integra ecu?

 

I want to get it BAR'D and from my understanding the ECU needs to match the engine.

 

No way. That's exactly what the EVAP is NOT supposed to do. OBD-II EVAP has NO connection with the outside world except to draw in fresh air; that is the entire point of OBD-II EVAP. Plus, as the years have passed, the bureaucrats have tightened EVAP standards to the point where it's the #1 cause of MIL illuminations.

The 3-way valve is used by the ECM to apply test-vacuum to the tank-side of the fuel system, and the canister-side of the system. These tests can even run when the engine is off.

Earlier OBD-II EVAP systems did not have a single 3-way valve, but instead had two separate control valves: One for the tank and one for the canister. This is probably where your incompatibility comes in. You need a canister that is meant for your car's ECM and wiring, since it's the ECM that sends the electrical signals to the various solenoids and valves as part of its testing.

If you're mixin'-and-matchin', you need proper wiring and vacuum diagrams, plus ECM pinouts. The best place for that is Honda itself. https://techinfo.honda.com. $10 buys you 3 days of all-you-can-download. It's the very best there is, and everything you need to know is there.

BAR does indeed mandate that the entire emissions system be swapped from the one vehicle to the other, including the EVAP and the ECM, so you don't really have much of a choice here.

So. How good a wrench are you, really? You're about to find out!

 

Thanks for clearing up that up for me Tegger!

Well i have the 99 integra LS ECM and the 99 EVAP canister with purge valve all wired up yet i'm still getting the P1457 code so my next guess is to install the 3 way valve.. if that doesn't work then my only guess is the pin outs on the ECM are correct to the EVAP Shut Valve.