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2000 Jeep Cherokee Large vapor leak

Tiny
JAKE77
  • MEMBER
  • 2000 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 74,000 MILES
I get a code 455, large vapor leak, with the check engine light on. I retightened the gas cap and the light still comes on. I can smell a strong fuel odor from the gas cap side, towards the rear of the vehicle where the gas tank is. How do find where the leak is?
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Friday, October 10th, 2008 AT 8:17 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
A smoke machine is attached and smoke is pumped in, where it comes out is the leak. You can only hope to visually find a pinhole, they can appear at the filler pipe. Check for rust, or crusted on diry, wipe it off and inspect the area.
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Friday, October 10th, 2008 AT 8:29 PM

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