Vacuum Leak? I went outside a little while ago and opened and tightened the gas cap, and I am hoping that was the problem. I will find out tomorrow if that was the problem. If it was the gas cap, how long do you think it will take for the CEL to go away?
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2006 Mustang GT Coupe Automatic
Mods:
C&L Street Intake, 93 Octane Tune, Pypes O/R H-Pipe, Flowmaster Axelbacks
Vacuum Leak? I went outside a little while ago and opened and tightened the gas cap, and I am hoping that was the problem. I will find out tomorrow if that was the problem. If it was the gas cap, how long do you think it will take for the CEL to go away?
It may clear on its own after a few driving cycles. If not, you can always go to autozone and they can read/clear the code.
I have one of those handheld scanners, so I can erase the code myself but I was afraid I may erase it and it could be something more serious than the gas cap. I will probably wait and see if it clears. Thanks for the prompt answers.
What about the vacuum leak? What is that about? I am not to mechanical.
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2006 Mustang GT Coupe Automatic
Mods:
C&L Street Intake, 93 Octane Tune, Pypes O/R H-Pipe, Flowmaster Axelbacks
I agree with stlwagon, that's probably a gas cap thing. The EVAP system is for capturing/recycling fuel vapors. You can see it if you look under the back of the car, right below the trunk/gas tank, there is a black plastic cover with some hoses and other stuff including a canister. Hoses run from the canister to the engine bay and on the driver side toward the firewall is the EVAP purge valve. It's a black plastic thing. It's nothing you need to mess with, just pointing it out as another component.
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06 Tungsten Manual, Powerhouse Turbo ,Hurst, Eibach Pro-Kit, Tokico Ds, Powerslot rotors, FR Sways, FR Strut Tower Brace, CHE poly Panhard, CHE poly LCAs, CHE DS Loop, CHE Axle Brace with LPW diff cover, Powerhouse DS, SOS triple pod pillar, Autometer FP/DPSS, Innovate LC-1/XD-16, MRT hood struts, MGW, underhood line locks, Stefs slop bucket
it's going to be your fuel pump. oversized orifice on the fuel pump is causing to loose tank pressure. i just fixed one yesterday by replacing the fuel pump. please dont go to autozone those guys try to put ideas in your head and they make you more confused then you'll be suspicious about the guys that really know what they are doing. most likely when you get an evap code it's usually never a gas cap. most times it's the evap canister purge valve. evap managent valve, hose or line that leaks, and very now and then the vap canister itself.
I have only 11K on my 05 GT and it just clicked on the engine light last week. It went off after 3 driving cycles, just like the manual said, then it came on again on yesterday (monday 5/7/07). So, I'm gonna see if it goes out again. But, in the meantime, is the fuel pump easy to inspect myself?
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2005 GT Convertible Premium, 5-sp man, Torch Red, Charcoal top and leather int, upgraded interior, Flowmasters
Since Mon (5-7-07) the Check Engine Light went out. Driving was fine and no probs. Then on Thur, during normal driving around town, the Check Engine Light started Flashing and engine started running badly. I stopped at my appointment, and the check engine light was not flashing the next time I started it up. It has run fine since then. This is the third episode of flashing engine light and second of solid on Check Engine Light.
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2005 GT Convertible Premium, 5-sp man, Torch Red, Charcoal top and leather int, upgraded interior, Flowmasters
hello,
i have had this exact same problem. i am embarrassed to admit it but my check engine light has been on and off since 2005 due to this small evap leak code. It wasn't until a few months ago that they finally confirmed that it is a leak coming from the actual canister like mentioned above. They quoted me almost $400 bucks to fix it. What I would like to know is... How serious is it? I mean it's been occurring all these years and hasn't yet affected the car, at least that I can tell. Please help!
2006 Mustang GT with MMR cold air intake, flowmaster exhaust, 20 inch wheels, Orion HCCD 250 watt amp, 2 Kicker 12", 3D carbonbody kit, and sct xcal3 on New Years
CEL Code P0456 EVAP Emission Control System Leak Very Small 
,Hurst, Eibach Pro-Kit, Tokico Ds, Powerslot rotors, FR Sways, FR Strut Tower Brace, CHE poly Panhard, CHE poly LCAs, CHE DS Loop, CHE Axle Brace with LPW diff cover, Powerhouse DS, SOS triple pod pillar, Autometer FP/DPSS, Innovate LC-1/XD-16, MRT hood struts, MGW, underhood line locks, Stefs slop bucket
