Question about 2005 Jeep Grand Cherokee

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Possible vacumn line leak in line to gas tank. where is the line?

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  • robinjk201 Oct 02, 2009

    Gas cap has been replaced and new one is put on all the way but light still comes on occasionally and keep having to re-tighten cap to get vacuum back to get light off.

  • robinjk201 Oct 02, 2009

    Gas cap has been replaced and new one is put on all the way but light still comes on occasionally and keep having to re-tighten cap to get vacuum back to get light off.


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The line runs from the purge canister to the fuel tank along the frame, what makes you think you have a leak? any kind of a vaccum leak would make the idle go up in rpm,s or the hvac with blower on would go from where ever you set it to defrost (default setting with no vaccum) if you are just getting a check engine light of small evap leak 99% of the time it the gas cap o-ring worn or cap not tight.

Posted on Oct 02, 2009

  • simidrm45844 Oct 03, 2009

    Then you have a vaccum leak either in the line from the tank,or at the leak detection pump which is located behind drivers headlight,on the driver side fender is a square black canister that is the purge canister,there should be a vaccum hose from intake to the canister,it is the larger of the two,the smaller line is to the leak detection pump,check all the hose connections that they are tight,and if you have a hand vaccum pump hook it up to each line and see if each line will hold vaccum,the line on the bottom of the purge canister should be the one to the fuel tank,


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