evap question 99FSM - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-11-2007, 03:12 PM   #1
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where is the canister vent valve located?
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Old 05-11-2007, 03:22 PM   #2
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Canister evap purge valve right? It is located on the back of my 97, behind the alternator. Looks like a rectangular black box 1.5" x 1" with 2 vacuum lines and one electrical connector. I'd assume yours would also be there, the L36 or NA crowd got them on the front of the motor IIRC.
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Old 05-11-2007, 03:33 PM   #3
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nope vent valve i heard its somewhere close to the gas tank? but im not sure
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Old 05-11-2007, 03:41 PM   #4
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Your year...maybe. I know on the 97..there is no valve back by the tank. Only a vent tube.
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Old 05-11-2007, 03:59 PM   #5
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I'll check my 99 fsm'*
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Old 05-11-2007, 06:28 PM   #6
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underneath the pcm
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Old 05-11-2007, 06:44 PM   #7
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Old 05-11-2007, 11:56 PM   #8
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The vent solenoid is in the rear on the 2000+ models.
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