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?
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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