Evaporative emission system leak detected (gross leak/no flow) any ideas what is causing the problem

Asked by Feb 27, 2012 at 06:03 PM about the 1999 Mazda MX-5 Miata Base

Question type: Maintenance & Repair

Chech engine lite came on P0455 code detected

2 Answers

4,515

Could be as simple as forgetting to replace the cap after filling gas tank. Barring that, a defective cap will cause same. If neither of those are the culprit, you'll need to look over the EVAP system plumbing for cracked hoses, loose connections, etc. This is the system that routes fuel vapors from the tank to the intake manifold to be burned rather than just vent to atmosphere like the old cars did. A good repair shop will have equipment called a smoke generator. They will hook it up to the system and it presurizes the plumbing and fills it full of smoke. Finding where smoke is escaping will pinpoint the offending leaks. Good luck!

4 people found this helpful.

Thanks for the info, off to the mechanic I go.

Your Answer:

Mazda MX-5 Miata Experts

  • #1
    Michael Kane
    Reputation
    2,220
  • #2
    Tom Demyan
    Reputation
    1,280
  • #3
    Racer_X
    Reputation
    410
View All

Related Models For Sale

Used Ford Mustang
256 Great Deals out of 38,498 listings starting at $1,350
Used Honda S2000
5 Great Deals out of 331 listings starting at $5,600
Used Chevrolet Corvette
90 Great Deals out of 15,068 listings starting at $3,620
Used Chevrolet Camaro
240 Great Deals out of 27,310 listings starting at $2,077
Used Porsche Boxster
20 Great Deals out of 1,091 listings starting at $3,495
Used BMW 3 Series
898 Great Deals out of 31,547 listings starting at $900
Used Honda Civic
407 Great Deals out of 49,589 listings starting at $1,495
Used Jeep Wrangler
245 Great Deals out of 16,436 listings starting at $3,000

Used Cars For Sale

2018 Mazda MX-5 Miata For Sale
2,115 listings starting at $24,410
2017 Mazda MX-5 Miata For Sale
6 Great Deals out of 968 listings starting at $19,965
2016 Mazda MX-5 Miata For Sale
3 Great Deals out of 332 listings starting at $15,599
2015 Mazda MX-5 Miata For Sale
4 Great Deals out of 119 listings starting at $12,500
2014 Mazda MX-5 Miata For Sale
50 listings starting at $13,950

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.