1998 Acura Integra GS, 4D Sedan, AutomaticFACTORY OEM SERVICE PROCEDURE

EVAP 2-Way Valve

  1. Remove fuel filler cap. Remove fuel tank vapor hose from EVAP 2-way valve. On Integra and 2.3CL, EVAP 2-way valve is located on fuel tank. On 2.5TL, 3.2TL and 3.5RL, EVAP 2-way valve is located at left side of engine compartment. On 3.0CL, EVAP 2-way valve is located at rear of engine compartment. On 2.3CL EVAP 2-way valve is located at right side of engine compartment. Connect hose end to a "T" fitting connected to a vacuum/pressure gauge and vacuum pump. See Fig 1.
  2. Slowly apply vacuum while observing vacuum/pressure gauge. Vacuum should stabilize (valve opens) momentarily at 0.2-0.6 in. Hg (0.8-2.1 kPa). If vacuum stabilizes within specified range, go to next step. If vacuum stabilizes less than or more than specified range, replace EVAP 2-way valve and retest.
  3. Move vacuum pump and vacuum gauge from vacuum side to pressure side. See Fig 1. Slowly pressurize vapor line while observing gauge. On Integra and 2.3CL, pressure should momentarily stabilize (valve opens) within specified range. On 3.0CL, 2.5TL, 3.2TL and 3.5RL, pressure should momentarily stabilize (valve opens) at a pressure greater than 0.3 in. Hg (1.0 kPa). If pressure stabilizes as specified, valve is okay. If pressure does not stabilize as specified, replace EVAP 2-way valve and retest.
    Fig 1: Testing EVAP 2-Way Valve (Integra Shown; Others Models Are Similar)
    G96D10069Courtesy of AMERICAN HONDA MOTOR CO., INC.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.