Fault code / charcoal canister / purge valve

[Dan_FR]

The charcoal filter can be bypassed by basically, bypassing it. Allow the tank vent from the bulkhead to breath to atmosphere - run a pipe to vent it in the inner wing, and leave the pipe running to the N80 open so that it can still take in air. It's a very simple system that can be tested before shelling out hundreds of pounds on parts you don't need

[pudding]

That's just drawing air in from atmosphere - i.e. a big air leak.   The evap circuit is a sealed system and the fuel vapours are accounted for in the tune.

And if MOT testers can smell the make shift tank vent dangling in the wing, instant fail.

[Gtcpaul1971]

I didn't fit the evP purge valve as he said he could hear it clicking on and off. I asked him to check the dv that I had fitted last year. He said he has never heard of a diverted valve and it doesn't have one 
Eventually he said they called it something else when I explained what it was. Somebody recommended Sunset Derby on here. I am sure they are good but I want a garage who knows the mk5 5 gti like the back of their hand etc. I was hoping for a little more suggestions of what it could be. I could have changed the canister my self. He didn't fill me with confidence while he was talking to me. I felt I had a better understanding from knowledge off here and personal experience. I thought Midlands VW were better who changed my tensioner a while back. Just my opinion
He tried taking the oil cap off and pulling the dipstick out while the engine was running. He said it shouldn't have a lot of resistance and when it did, he said that wasn't right but didn't say what was wrong? I always thought that it was a good sign that the engine laboured when you opened the oil cap or dipstick? Have I got this wrong? I'm confused?
I am still looking for someone near me to drive it and tell me I'm not going mad lol

[Dan_FR]

That's just drawing air in from atmosphere - i.e. a big air leak.   The evap circuit is a sealed system and the fuel vapours are accounted for in the tune.

And if MOT testers can smell the make shift tank vent dangling in the wing, instant fail.

Its not a big leak - it's a tiny intake of air that is regulated by the N80 valve, just not rich with petrol fumes as it would be if it were from the tank. Doesn't mess up fuel trims and the car will run perfectly

A whiff of petrol without locating a leak is not grounds to fail it

[pudding]

Well, it kind of is, hence the "incorrect flow" fault code.  It's sensitive enough to know there is too much air.   It's common sense.  2 pipes open to atmosphere isn't exactly a sealed circuit.  Any issues with the evap circuit and you don't get any adaptations, so I don't believe it will 'run perfectly' when doing that all.

[Dan_FR]

The incorrect flow fault code is caused when there's no flow.... not too much. It's only too much if the N80 valve has failed open.... If the N80 is working correctly, you get adaptions and it has no effect on fuel trims. I've run mine like it for 3 years or so and my fuel trims sit inside 1% for both on generic Revo software