Limited fuel to cylinder 5

[Yorkie]

I have recently changed all the fuel injector pipes and also the two banjo bolts for feeds 2 and 5. I have also installed a new fuel tank. I filtered the fuel from the old tank into the new tank.

 

Everything worked well for the first day but since then the engine is mis-firing. I have tracked this down cylinder 5. I have put back the old banjo bolt incase the new one was causing a problem. I have also blown through no. 5 injector pipe and air does pass through it, but the car still runs like a dog especially when cold.

 

I am stuck, can anyone help?

 

Thank you

 

Al

[Peter Cobbold]

There was a post maybe a month back with photos of new and old banjo? The new ones were too long and ruined running - worth a search. Or checking yours side by side.

Edited October 11, 2012 by Peter Cobbold

[Ashley]

If you remove the number 5 injector with the engine running is it spraying a cone of fuel?

If not, hold the injector so that it points upwards and with your thumb push against the needle ( this forces the needle up and out of it's seating) with your other hand have a rag to catch the fuel. Hopefully this will clear the injector. If it does'nt, push down on the needle base surround. This should cause the pressure to back up in the pipe from the MU to the injector, after a while there should be a drop in engine revs. This drop occurs because the other injectors are running to rich and will prove that the non-return valve at the banjo bolt is working.

 

I have recently had problems with injectors and was show this by a TR specialist.

[peejay4A]

It's possible that you have a shred of the old banjo bolt seal lodged in the injector if you don't see a cone as Ashley points out. Try blowing the injector through with compressed air.

[Mike Collins]

Is there continuous injection at no.5?

I found that the banjo fitting itself was not symmetrical, the O ring recess had a larger diameter on one side and allowed a permanent flow of fuel to the injector.

Turning the banjo 180 degrees cured that.

 

Mike.

[Yorkie]

Thanks everyone for your help and views, I've still not fixed the problem. I have now realised this morning, that with the injector off the pipe to No 5, the flow of fuel out of the pipe is still restricted. Therefore iliminating the injector from the problem. I am going to put back the old plactic pipe and I will also look at the banjo again!

 

Any more ideas?

 

Thanks everyone, again

 

Al