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A friend has a 2011 TT and claims his fuel gauge is not reading properly. We have taken both covers off and can move the floats around it seems to respond normally.This is the newer design that only has one fuel pump on the passenger side. I would think that the fuel level goes down equally on both sides (shared upper region) and then when it gets to the separation/split point, should the fuel level go down equally on each side or should the drivers side go down first and then the passenger side? He thinks they should go down equally but I am leaning towards not because the only device in the drivers side is the jet/suction pump and I think its sole purpose is to get fuel from the left side and push it into the right side pump area. That is how an airplane works so I could be totally wrong! Anybody know for sure how it is supposed to work? Right now, the drivers side is empty and the passenger side had 1/2 or so. Is the jet pump from the right side supposed to push fuel over to keep it balanced all the way down or is it supposed to drain one side down first?
If I run the car at less than 1/4 tank full it's very smooth great acceleration and responsiveness. With engine running I went and filled up with 99 octane as usual and straightaway the engine stutter comes back!!!!!!!! Fyi it is NOT fuel quality.
I've started a new thread for this but it's an old problem mentioned in previous posts and unresolved.
Basically the ctt 06 with 114,000km has been hesitating and stuttering for a while when accelerating particularly under boost in lower gears through the rev range of 2k 3k 4k ish rpm, it also will vibrate and stutter revving the same rpm in neutral/park when stationary. (which is very weird).
So after a lot of finding issues which helped the car overall none of them sorted this stutter out.
New oem Coils, plugs, n75 valve, air filters, purge valve, and Dv's,
Fixed a lot of vac and pcv pipes which leaked
Smoke tested intake no leaks boost is +0.8
Head Gaskets done a few 1,000 km all new parts gasket Seals etc. (problem was present before and after head Gasket work).
I had a suspicion that the lower fuel level was playing a part in this but I can't work out why a fuller tank would cause running issues?