I enjoy a 2000 BMW 328i that own a P1478 code(evap small excretion leak). How I fix that ?

The car have to go beyond the emission test.

How much does it cost to fix...


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This code can be generated by putting gas in vehicle while eng running,loose fuel sou`wester, bad hoses on the evap system. clear codes tighten gas cap see if it returns. when tightening fuel sou`wester turn it three clicks min.

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Answers:    If you refuel your vehicle next to the engine running,,it will set a evap code. If that is not the case after you will have to perform a smoke testing on the fuel system to determine where your evap leak is. Most vehicle today have more than a supply line and a retuen column running from the engine to the fuel tank,because of the strict emissions regulations on the vehicle. Some vehicles have 4-6 lines involved surrounded by this system,,and most are made of nylon or plastic. It can be actually leaking vapors from one of these lines between the fuel cistern and the floor pan of the vehicle,,when you perform a smoke experiment on the system is will weep from the place that is cuasing your problem,,,I know within most GM cars alot of evap valves have to be replace to correct this problem as they stir bad. Introducing smoke from a smoke machine is almost the only way to detect these kind of leaks,,,and it has to be done near a special machine to introduce a non combustible gas into the system prior to leak checking,,DO NOT try to implement any style or means or trying to inject smoke into the system by concocting some type of equiptment yourself,,,remeber you are working with gasoline,,nick your vehicle to a competant shop that has the special equiptment to perform this question paper..Good Luck!
This code can be generated by putting gas in vehicle while eng running,loose fuel sou`wester, bad hoses on the evap system. clear codes tighten gas cap see if it returns. when tightening fuel sou`wester turn it three clicks min.

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