I have a Ford Focus 1.6 TDCi..
Recently I noticed a hissing sound coming from the engine particularly when cold. The hiss changed frequency with engine speed!
I have removed all the plastic nonsense from the top of the engine and noticed that the area surrounding injector 2 was all wet and looked goey. The hissing seemed to be coming from this area, spraying some WD alike into the area resulted in some bubbling from around the area.
Unplugging the injector does not effect the hiss.
A quick google suggests that there are possibley sealing washer at the bottom of the injector which can go buggered.
Can anyone tell me if they think this is a possible cause of the hiss/air leak.
Would this be likely effecting the MPG?
I have heard mention that you can get the washers cherry hot and re-use, is there any advantage to this as opposed to not being a tight arse and replacing it?
The injector seems to be removed by disconecting the HP Fuel feed, the LP return, electrickery and then removing two female hex bolts (these look a bit wired like they have anti tamper posts??) does the injector simply lift out then?
Ta
Tom