Hey,

 

Recently I changed my fuel filter. The last one was like 2 years old and somehow my car started to act way nicer than before. Previously there was some unstable idle and some stalling from time to time. Not anymore. But that's the good thing about that.

 

The bad thing is there is some fuel leak. My fuel filter is UFI type (take a look below. I didn't  make a picture of mine but this something like that, taken from the Internet). The fuel collects on the fuel filter cover and I assume that one of the hoses is loose and it might got that during the filter change (you know, I had to move it a bit). Any ideas what to do? Should I change these clamps just in case? What about air in the fuel system then (I have no VCDS)? Maybe I can change the clamps only for the hoses that supply the fuel from the tank to the filter (by the way, how do I know which ones are they?) because they are most likely to be the ones?

 

 

 

 

You can replace any weak clips with screw type hose clamps.  Fuel hose gets hard with age, sometimes just twisting the hose and reseating the spring clip will sort a leak.

Also check that the hose are not split as they can get damaged over time.  If the hoses are damaged you will need to get some new hoses.

A friend told me just to remove the end of the hose (if the length of it is sufficient) because of it getting old and hard.

I'm willing to start with the ones providing the fuel from the tank. How do I determine which ones are that?

This pic may help

Thanks! That picture is quite nice one.

 

At first I thought that there is a leak in the connection place (rubber hose & metal pipe). Seems like it's not the case. Then it seemed to be that there might be a leak between the filter tank and the cover. I even retightened the bolts - didn't help.

Finally there was idea that maybe one of the hoses have some kind of crack or so. I took my car to a garage for some brake work and they took a look here as well. According to their story, the top one is leaky (yellow one if I understood them right).

I had the same problem with leaky pipes as they get damaged by garages who try to remove them when trying prime the filter when in reality there is no need to touch the pipes.   You can get replacement pipes from your local Skoda dealer but they come in a pair and I think cost about £80.   If you have the engine running you should be able to see which hose is leaking.

A little update.

The hoses were OK. Like I suspected before, there was some leak between that filter tank and it's cover. I tried even a different gasket - didn't help.

Had to change the filter tank itself.

 

I really can't say why it happened but it seems like it's way more fragile than it looks like I didn't use much force to open it and I tried to tighten the bolts one by one gradually but somewhere was some unfortunate mistake.