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

3,745

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 of 4 people found this helpful.

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

Your Answer

Add photo

Related Questions

Search Mazda MX-5 Miata Questions

Mazda MX-5 Miata Experts

#1 Michael Kane
Michael Kane
Reputation 1,980
#2 Tom Demyan
Tom Demyan
Reputation 1,180
#3 Racer_X
Racer_X
Reputation 390
View All

Related Models For Sale

Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Honda S2000
13 Great Deals out of 289 listings starting at $6,500
Used Chevrolet Corvette
120 Great Deals out of 20,753 listings starting at $3,000
Used BMW 3 Series
973 Great Deals out of 31,729 listings starting at $1,000
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Porsche Boxster
42 Great Deals out of 1,185 listings starting at $4,300
Used Honda Civic
657 Great Deals out of 88,603 listings starting at $995
Used Jeep Wrangler
277 Great Deals out of 18,163 listings starting at $2,950

Used Cars For Sale

2017 Mazda MX-5 Miata For Sale
1,498 listings starting at $24,549
2016 Mazda MX-5 Miata For Sale
1,277 listings starting at $19,599
2015 Mazda MX-5 Miata For Sale
7 Great Deals out of 121 listings starting at $16,668
2014 Mazda MX-5 Miata For Sale
118 listings starting at $13,400
2013 Mazda MX-5 Miata For Sale
3 Great Deals out of 115 listings starting at $12,000

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.