All Things Mk5 > How to Guides / Troubleshooting

Intake Runner Flap Fault

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Shoduchi:

--- Quote from: Pudding on January 27, 2016, 03:44:31 pm ---What is the purpose of the flaps?  I heard removing them can make the engine feel less lively off boost.  Is that true?

--- End quote ---
Their purpose is good. They use the Venturi effect to increase the speed of air intake at low rpm, so the engine runs better at low rpm with them working properly.

I can't say I miss them with the engine tuned. :grin:

pudding:
Ah OK, so they are 'swirl' flaps.  Speed up the gas flow at low rpms as you say, which is a good thing!  Think I'll be leaving mine in place  :smiley:

I love what happens past 3K in the Ed30, but not so thrilled below that, so don't want to make it even worse!

Shoduchi:

--- Quote from: Pudding on January 29, 2016, 09:49:25 am ---Ah OK, so they are 'swirl' flaps.  Speed up the gas flow at low rpms as you say, which is a good thing!  Think I'll be leaving mine in place  :smiley:

I love what happens past 3K in the Ed30, but not so thrilled below that, so don't want to make it even worse!

--- End quote ---
Yeah, you can leave them there. I'd just make sure they are kept clean and I'd replaced them from time to time to prevent any from breaking and entering the engine. :happy2:

Mine is fine bellow 3k rpm, it's where I drive sensibly without being very noticed with my exhaust sound. :laugh:

GibboVR:
Thought I would update to let you know it's sorted..

Ran output test through vcds on the flap pump, as the fault code said it wasn't working but it clearing was. Checked on its parameters on measuring block 142 if anyone else needs it and all was fine. Then I performed basic setting and took it for a drive.. Back to normal!

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