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my car fixed itself.. #4559705
10/30/17 09:23 PM
10/30/17 09:23 PM
Joined: Jun 2009
Posts: 769
Chicago
bowlofturtle Offline OP
bowlofturtle  Offline OP
Joined: Jun 2009
Posts: 769
Chicago
Ha! Gave me a great laugh today.

The infiniti in my sig is my daily. Back in May I had a CEL for small evap leak. I would clear it and it would come back like clockwork. I checked the basics up top, fuel cap sealing decent and evap purge solenoid activated when i gave it 12v. I cleared it and it would come back, flash forward to July when i actually had time to crawl under and get to the canister and 2 other valves, applied voltage and heard them click. I was out of ideas without a smoke machine.

Early this month i noticed the CEL finally turned off, i figured it one of those trip cycles things but its stored in pending/memory. Pulled out my scanner today because i had time, WOW no codes in stored or pending. No codes what so ever. Its like the fault never happened. I checked the readiness monitors, all are green. Obviously i'm happy, i never thought the fault would completely clear itself.

I honestly believe the fault to be gas cap related as thats the only thing that could have been tweaked every fill up. I expect this code to come back at one point. My car is a rust belt car, i wouldn't be surprised if something rusted out.


My toys
-05 Infiniti G35x 121k
-03 Suzuki SV650N 8.5k
Maintaining
-16 Jetta 1.4T 7k
-98 Nissan Maxima 145k
-09 Toyota Camry V6 86k

Re: my car fixed itself.. [Re: bowlofturtle] #4559713
10/30/17 09:39 PM
10/30/17 09:39 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
You should try laying hands on another car with a mysterious problem. If that fixes it you might have a new calling. Did turtle soup give you special powers?

Re: my car fixed itself.. [Re: OneEyeJack] #4559724
10/30/17 09:52 PM
10/30/17 09:52 PM
Joined: Jun 2009
Posts: 769
Chicago
bowlofturtle Offline OP
bowlofturtle  Offline OP
Joined: Jun 2009
Posts: 769
Chicago
Originally Posted By: OneEyeJack
You should try laying hands on another car with a mysterious problem. If that fixes it you might have a new calling. Did turtle soup give you special powers?


The soup might have, or a strange yearning for pizza.


My toys
-05 Infiniti G35x 121k
-03 Suzuki SV650N 8.5k
Maintaining
-16 Jetta 1.4T 7k
-98 Nissan Maxima 145k
-09 Toyota Camry V6 86k

Re: my car fixed itself.. [Re: bowlofturtle] #4559732
10/30/17 10:06 PM
10/30/17 10:06 PM
Joined: May 2010
Posts: 9,044
North Carolina
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,044
North Carolina
Evaps can be a pain, the cap unless new is always suspect in my book. Can depend on temp, fuel level etc. I'd start with the cap.


13 elantra 70k 5w30 QSUD
03 chevy avalanche79k synpwr 10w30
01 saturnsc1 185k synpwr rebuilt
17 mazda cx-5 5600 miles m1 0w30
Re: my car fixed itself.. [Re: bowlofturtle] #4559770
10/31/17 12:20 AM
10/31/17 12:20 AM
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
Any overfills will put you in harms way. Running with 7/8's down to 1/4 tank and not over filling will clear eventually. Could have been nozzle at station ... Maybe filled at different station and not quite so full ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: my car fixed itself.. [Re: bowlofturtle] #4559783
10/31/17 02:05 AM
10/31/17 02:05 AM
Joined: May 2005
Posts: 10,266
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,266
ROCHESTER, NY
Originally Posted By: bowlofturtle
Ha! Gave me a great laugh today.

I honestly believe the fault to be gas cap related as that's the only thing that could have been tweaked every fill up. I expect this code to come back at one point. My car is a rust belt car, I wouldn't be surprised if something rusted out.


Often it is rusted out lines from either side the fuel filler tube going into the tank or the tube itself. Remove the wheel well liner on the filler side and check their condition.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX(17K)
Re: my car fixed itself.. [Re: spasm3] #4559801
10/31/17 04:31 AM
10/31/17 04:31 AM
Joined: Feb 2013
Posts: 3,226
Central Virginia
Silverado12 Offline
Silverado12  Offline
Joined: Feb 2013
Posts: 3,226
Central Virginia
Originally Posted By: spasm3
Evaps can be a pain, the cap unless new is always suspect in my book. Can depend on temp, fuel level etc. I'd start with the cap.


From my experience the issue has never been the cap; it's usually a vacuum line or bad purge or vent valve.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: my car fixed itself.. [Re: Silverado12] #4560031
10/31/17 10:06 AM
10/31/17 10:06 AM
Joined: Jan 2016
Posts: 597
Nebraska
Duffyjr Online content
Duffyjr  Online Content
Joined: Jan 2016
Posts: 597
Nebraska
I think you're right thinking it is/was the cap. My Buick was doing this and mech told me to clean the cap and nozzle real good, hasn't come back on yet.


89 GMC Sierra T5 10w30/Wix
08 Lucerne CX NAPA Blend 5w30/Napa Gold
18 Toro Super Recycler T5 10w30
Re: my car fixed itself.. [Re: Silverado12] #4560757
10/31/17 11:37 PM
10/31/17 11:37 PM
Joined: Jun 2009
Posts: 769
Chicago
bowlofturtle Offline OP
bowlofturtle  Offline OP
Joined: Jun 2009
Posts: 769
Chicago
Originally Posted By: Silverado12
Originally Posted By: spasm3
Evaps can be a pain, the cap unless new is always suspect in my book. Can depend on temp, fuel level etc. I'd start with the cap.


From my experience the issue has never been the cap; it's usually a vacuum line or bad purge or vent valve.


Same with me. I've replace more purge or vent valves than anything else when i see evap codes. The other cars i've seen were obvious damage of the charcoal canister. Never had I seen a gas cap fix an evap problem.

In my head it makes sense that it could be the cap, i've always made sure its on with a good seal. I actually had a feeling right after i posted it, the CEL would be back... still waiting.


My toys
-05 Infiniti G35x 121k
-03 Suzuki SV650N 8.5k
Maintaining
-16 Jetta 1.4T 7k
-98 Nissan Maxima 145k
-09 Toyota Camry V6 86k

Re: my car fixed itself.. [Re: spasm3] #4560978
11/01/17 08:26 AM
11/01/17 08:26 AM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
Originally Posted By: spasm3
Evaps can be a pain, the cap unless new is always suspect in my book. Can depend on temp, fuel level etc. I'd start with the cap.


I have repaired hundreds and hundreds of evap leaks. Only once was it the cap. It is actually more common to have a damaged filler neck from a rodent chewing through it.

Last edited by mightymousetech; 11/01/17 08:27 AM.

Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
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