How to detect EVAP system leak with smoke tester?

2003 PONTIAC MONTANA

85,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC

XJSHEN

MEMBER
251 POSTS
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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

CAR REPAIR CONTRIBUTOR
110,190 POSTS

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.

Images (Click to enlarge)

Nov 21, 2020 at 7:55 PM