How to detect EVAP system leak with smoke tester?

2003 PONTIAC MONTANA
85,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC
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XJSHEN
  • MEMBER
  • 251 POSTS
There was a EVAP system leak test failed by by DTC's diagnosis. I got smoke tester. But I don’t know where to connect the smoke delivery tube tip.
Thanks for your instruction and helps!
Nov 21, 2020 at 2:01 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

The EVAP service port is located in the EVAP purge pipe between the EVAP purge solenoid and the EVAP canister. The service port is identified by a green-colored cap

I attached two pics below. The first shows the canister which is near the fuel tank. The second shows the solenoid. If I recall, the service port is near the purge solenoid (number 11 in pic 2)

Let me know if this helps.

Joe.
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Nov 21, 2020 at 7:55 PM
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