When I did the 3.4 engine swap in my 4Runner, I didn’t pull over the EVAP system from the donor vehicle, so I’ve been running without one for a few months now. My donor vehicle for the swap, a 2002 4Runner, had the newer style EVAP system located back by the fuel tank, something I didn’t want on my ’92. Since then, I’ve acquired the older style 3rd gen EVAP canister and VSVs (Vacuum Switching Valves), and I still have the original ’92 canister, and I’m trying to piece together Frankenstein’s EVAP system from all these parts to work with my swap.
Parts
Here’s what I have to work with:
- 2002 engine wiring harness
- 2002 VSV for EVAP
- 2002 VSV for CCV (Canister Closed Valve)
- 1999 VPS (Vapor Pressure Sensor)
- 1999 VSV for EVAP
- 1998 EVAP canister (larger box style)
- 1998 VSV for VPS (Vapor Pressure Sensor)
- 1992 EVAP canister (smaller cylindrical style)
I saw a few places reference the “VSV for EVAP” part as the “Canister Purge Solenoid,” which may come in handy when looking for replacement parts.
Process
First, I had to figure out what plugs I had available on the 2002 engine harness to work with. Using the 2002 wiring diagram, I was able to locate the plugs for the VSV for EVAP and the VSV for CCV.
However, the other 2 plugs were part of the body wiring harness on the donor car which I did not keep, so I’ll need to do some extra wiring work to hook up the VPS and VSV for VPS.
Check out Part 2 as I map all of this out and figure out how to hook it up so my 3.4 swap can have a working EVAP system!