Project Stob

Further update. After removing some components I have tested the the Actuator with some pipe (and Mrbroons sourced suction) and it works as expected. So this component is fine, the potentiometer needs further testing with a multi meter by testing the yellow cable below plus ground. Then onto the solenoid and the vacuum hoses themselves.

Further updates tomorrow. Lots of footage taken so if this come out well I'll post this tomorrow.
38d2615f56a811cbf4193024d09b0ed3.jpg
 
On point 4 its likely just the glovebox that needs to come out - the temp flap motor is behind here.

I got WOM to do mine and I bought a new replacement after getting fed up of being boiled alive.
 
On point 4 its likely just the glovebox that needs to come out - the temp flap motor is behind here.

I got WOM to do mine and I bought a new replacement after getting fed up of being boiled alive.
Sorry sir. Im under the bonnet fixing the FSi intake flaps and the "setpoint not reached error" not the heating system.
 
Quick update. I have now re-re-tested on measuring block 142 and when moving the arm I get from around 24% to 100% registered, so I'm guessing that the potentiometer is in fine shape. I have also unplumbed the actuator and when running the intake manifold tests there is no vacuum present through the hose (I presume this is NOT normal?). My next step is to get some tubing and test the actuator manually to rule this out at the culprit.
You should see 0% (1.6% seems OK), flaps open, with no vacum. So, check flaps are fully open, and held there by the return spring. Once the flaps are known to be fully open and return spring functioning, suspect the potentiometer unless you get 0 - 1.6%.
Mac.
 
The min value I get is in the low 20's but the flap moves easily and returns to this position. It could have been like this for some time however so I'm not going to pursue this value being wrong until after the car has had this issue resolved and I run the car for a while (it has not been used in a while). If there is a still an issue with the value not being correct (getting to 0 or there abouts) then I'll start afresh.
 
Unless you fix this fault, so that the ECU gets accurate feedback about flap position, it'll be impossible to diagnose and clear other errors. Unless you clear all errors, the engine cannot function as it should.
No point in having an FSI that doesn't drive like one!
Only my opinion, obviously. Mac.
 
You are all thinking this is more complicated than it is. The flaps have two positions, open and closed, the potentiometer has about 65. It is most likely to be a calibration issue. If my understanding is correct, the step is 0.02v for 1.6% of flap movement, so 20% only about 0.24v. What is the reading from your potentiometer?
 
Unless you fix this fault, so that the ECU gets accurate feedback about flap position, it'll be impossible to diagnose and clear other errors. Unless you clear all errors, the engine cannot function as it should.
No point in having an FSI that doesn't drive like one!
Only my opinion, obviously. Mac.

I hear what you are saying, however if the car has been sat for a while unused there may not be a problem to resolve as it could be through lack of use it is in this condition. I think that the pragmatic thing to do is to get the obvious issues addressed and then run it for a month and see what happens next. The car is not my daily driver and does not venture out at all, however like all cars they have to be kept moving to be kept in good order. So once the system is working I'll get it out on the road over XMas and then come back to it in the New Year and no doubt there will be a new list of problems to go with it.

Hope that makes sense? ?
 
That is not how you diagnose and fix problems. Have already emailed Ross Tech to get conformation on this and am waiting for a reply. Basically the potentiometer voltage when the flap is open does not match what is stored in the ECU as 0%. I think what you measure will differ with what you see in VCDS by ~0.25v. My email to Ross Tech will hopefully shed light on acceptable ranges and tolerances.
 
Happy to do so. I'm off to the gym for an hour or so but will do it when I return. It was next on the list to do now that I have the car in bits. I really want to get a look at the solenoid too as there is clearly no vacuum.
 
Can of petrol and a box of matches will help with this problem but me being me i wouldn't waste the petrol or the matches on it ;) lol

I have a silver FSI that is still outside my front door for the last 2+ years. I intend to use some parts from it, that being the doors and possibly bumper whenever i've got time to change them over.

Cammy
 
As I get on with the fixes I wanted to understand if capping, removing mapping out the egr is the right thing to do to aid with longevity?
 
Back
Top