Is it possible to tell where air is getting in

Phil2008

Phil2008

Phil2008

Soldato
Joined
17 Dec 2004
Posts
8,749
We have a vectra TDI and air is getting in somewhere, as it wont start after a few days but when you get the air out by loosening 1 of the fuel pipes(I think) it starts. Now this person thats a jaguar specialist thinks it might be the injectors but thats the prob, is there anyway of knowing for sure as it will cost about £150 to get them re sealed, or whatever needs doing with them?
 
Fuel system air leaks on diesels are commonly caused by poor sealing on the fuel filter, or by injector leak off pipes that have split/cracked.
 
Well this guy changed the injector seals and made things worse, as the fuel is going in the oil, so he thinks they are bad seals he has put on and its kangaroo jumping. So he is going to change them again.
 
Last edited:
He has change the seals again and its still drinking a tenners worth of fuel in about 5-10mins and dumping it in the oil. He says, it cant be anything else, so he is now going to get a tester to test the seals.
 
Lashout_UK said:
It doesn't have an injector that's stuck open, does it?
Click to expand...

No idea, but before he did the seals, all that was wrong with it was the fuel kept running back so it wouldn't start, and needed to thrash it every few days so it would continue to start from cold:confused:
 
Last edited:
Weird that the diesel is ending up in the oil, if it's using up as much fuel as you say then a stuck injector or two would result in loads of raw fuel coming out of the exhaust system.
 
Plus now the car wont try and turn over from the fuel tank, but it will start fine if you put the fuel pipe from the engine in a can of fuel, but sucking it up like their's no tomorrow.
 
2.0 dti engine suffers big time from perished leak off lines, the ones that come out of each injector and connect up to the pump fuel return.

Fresh piece of leak off pipe and 20 minutes fitting will sort it.
 
SB118 said:
2.0 dti engine suffers big time from perished leak off lines, the ones that come out of each injector and connect up to the pump fuel return.

Fresh piece of leak off pipe and 20 minutes fitting will sort it.
Click to expand...

I asked him, if any other pipes were perished/rotten, and he said no.. But yeah I would have checked and double checked the pipes before messing with the seals, but you cant really tell a mechanic how todo his job can you?
 
You can suggest something though, they don't know EVERYTHING, how can they with so many different models.
 
Phil2008 said:
I asked him, if any other pipes were perished/rotten, and he said no.. But yeah I would have checked and double checked the pipes before messing with the seals, but you cant really tell a mechanic how todo his job can you?
Click to expand...

Try it with the car facing up hill or down hill overnight. One way will let the fuel drain back, the other way won't, if it's the leakoff lines that is.

The problem won't be fuel leaking out of the lines, it's air getting in. They will still be dry to touch and will look fine.
 
SB118 said:
2.0 dti engine suffers big time from perished leak off lines, the ones that come out of each injector and connect up to the pump fuel return.

Fresh piece of leak off pipe and 20 minutes fitting will sort it.
Click to expand...

You were correct the pipe was totally corroded but, it looked like he's buggered it up some how doing the seals, as it wont start, from the fuel tank, only from directly putting the hose in a can of fuel, but even then, it dumps the fuel in the oil and sucks up a tenners worth or fuel in a few mins.
 
You must log in or register to reply here.
Back
Top Bottom