butterfly flap?????

scott

scott

A2OC Donor
I took my car to the garage today to have It diagnosed, Its had the engine management light on now coming up two years:mad: I had it diagnosed somewhere els and the told me it needed both inlet manifolds changed (nearly 1000 worth of work) so today I took it for a second opinion. I explained to them that some times when I start the car it sound like a diesel engine, (myn being a petrol) so they diagnosed it and said its actually (and i think this is what they called it) "a butterfly flap" or something along those lines.They said the cheapest way out of it as a 1st resort is to clean it and lubricate it, so has anyone had this problem and will it sort it??? The car is at the garage tonight and they are working on it 1st thing tomorrow.

I cant find any thing about it on the forum,maybe looking in the wrong place so thought I would ask

Thanks

Scott
 
Yes that's it, something to do with that they said will cleaning and lubricating fix it???
 
probably. they tend to get dirty, so a clean can't harm. If they then lubricate and then calibrate, it's a good start and should only take an hour or so.

Bret
 
Yea that's what they said they are charging me an hour labor so fingers crossed it will fix it once and for all

Thanks

Scott
 
what fuel are you using?

Fsi's are bad for carbon build up it used to be an old engines tale or carbon build up but with unleaded fuel rather than super/Petrol with additives its somthing you have to watch for.

I had a mitsubishi with the same Probs until I swopped to premium fuel that I should have used in the first place,More expensive sure but I did get more mpg too and no throttle body fouling.:eek:
 
scott as far as i am aware it is a noise all fsi's make on start up(sometimes) and it only last a couple of seconds at the most. i think it is something to do with fuel evaporation in the high pressure fual pump(driven from inlet cam).but the throttle body butterfly is known to get a bit oily and mucky but mine has never needed it as is has always been checked at service times. if you do it your self be carefull not to damage any of the pipe work as they are prone to air leaks!!!
cheers mike
 
But I thought with FSI, the fuel doesn't mix with the air and is injected into the cylinder via the fuel pump. So any cleaning agent or detergent won't go through the throttle body?

If the throttle body is dirty, that is somewhat expected over time as Bret said. But IIRC, Scott has a custom air filter, so may be that isn't doing the filtering and letting in too much dirt than it should?

I also know of a current storm over direct injection engine having dirty/sticky valves causing significant power loss. I think it was reported on the Cayenne and the Audi V8 FSI engines. But not heard of the problem on smaller ones, like the common 2.0 TFSI. I doubt that causes engine management light though.
 
humps said:
But I thought with FSI, the fuel doesn't mix with the air and is injected into the cylinder via the fuel pump. So any cleaning agent or detergent won't go through the throttle body?

If the throttle body is dirty, that is somewhat expected over time as Bret said. But IIRC, Scott has a custom air filter, so may be that isn't doing the filtering and letting in too much dirt than it should?

I also know of a current storm over direct injection engine having dirty/sticky valves causing significant power loss. I think it was reported on the Cayenne and the Audi V8 FSI engines. But not heard of the problem on smaller ones, like the common 2.0 TFSI. I doubt that causes engine management light though.
Click to expand...

The problem was their before I fitted the air filter but... you may have a point. The garage rung me and said they have cleaned the throttle bit what ever it was and the management light has gone off but they said the fault code is still their, they said it may be the intake and the management is reading its taking in to much air. When I get the car back tonight I will try and get the fault code but for now can any one shed any light on it, if any of that made sense??

Thanks

scott
 
I have the car back and engine management straight on! and... the diesel noise it makes sometimes upon start happened on first start! but they did say it was only a first resort. Anyway here is what is on my invoice they gave me.

Air bag light turned of (my fault removed front driver seat to fit sound system)
labour to strip and clean throttle body
fault code: 17439-variable intake manifold,
switchover valve, target valve not met
vehicle fitted with after market induction kit

well that's it:confused:
?????????????????????????????????????????????????????????

What should I do now:confused:

Thanks

scott
 
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