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Smoke test

Tiny
TINO12345
  • MEMBER
  • 2002 TOYOTA TACOMA
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Have evap issues, so replaced the gas cap, and filler neck tube going to the gas tank. Performed second smoke test and still get smoke coming out of the gas cap area. Is smoke coming out a normal condition?
Saturday, January 21st, 2017 AT 2:35 PM

5 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
This is a seemed system where ever the smoke is coming out is the leak, you might need to get under the car to see it.
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Saturday, January 21st, 2017 AT 4:17 PM
Tiny
TINO12345
  • MEMBER
  • 3 POSTS
How can I close vent valve without a scanner? Would I be able to smoke the filler neck if I remove from tank to isolate the problem? Like plug all the lines but one and smoke it to see if it leaks thru the same area. Thanks
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Tuesday, January 24th, 2017 AT 7:31 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
There would be no point. You need to know that the vent valve is capable of sealing as it may be your problem.
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Tuesday, January 24th, 2017 AT 8:54 PM
Tiny
TINO12345
  • MEMBER
  • 3 POSTS
Will a scanner from Autozone suffice for the purpose of my test? Closing the vent valve?
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Thursday, January 26th, 2017 AT 10:07 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
No, those aren't real scan tools. They are generic code readers. Real, bidirectional scan tools cost $4000 and up.
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Thursday, January 26th, 2017 AT 10:11 AM

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