Evening all, I have a vibration issue started on my 2011 focus diesel. When idling there is nothing but when I start to rev there is a vibration/rattle heard from the rear of the car. After looking it seems it’s the return fuel pipe. It isn’t vibrating against anything but looks like it starts right at the leak off pipes and gets worse as it goes towards and into the tank. I’ve removed the pipe and tank completely and cleaned them but it hasn’t made the slightest difference so assuming there is something else amiss causing the vibration. There is slight hesitation when pulling off at junctions too, but this could be me thinking there’s an issue and only overcomplicating my brain thinking now it’s making this noise! I do have a video and will try to upload

 

Are you sure it isn't from the exhaust?

6 hours ago, Bol said:

Are you sure it isn't from the exhaust?

As sure as I can be, there is no vibration at all on exhaust and you can feel the noise through the fuel line 

It's probably a dodgy injector.  You could try a leak off test to see if one is very different to the others.

For now you could try damping the fuel line.  Only need a fairly small piece of foam to wrap around it at the engine end to absorb vibrations.

26 minutes ago, TomsFocus said:

It's probably a dodgy injector.  You could try a leak off test to see if one is very different to the others.

For now you could try damping the fuel line.  Only need a fairly small piece of foam to wrap around it at the engine end to absorb vibrations.

Can forscan check injectors? 

Should add this too really as it may help. Forscan only shows one code - p0135 for faulty o2 heater circuit, however there isn’t an o2 sensor on the car? 

42 minutes ago, Baz205 said:

Can forscan check injectors? 

Not leak off, no.

47 minutes ago, TomsFocus said:

Not leak off, no.

Any idea what will be causing the fault code above? 

1 minute ago, Baz205 said:

Any idea what will be causing the fault code above? 

Further down the page it says that code can be ignored on this vehicle.  Some cars will have the sensor fitted, others won't.

Leak off test, not sure if I done it correct as everyone seems to do it different but this was 6 mins at tickover

Looks like the 4th injector is leaking off too much.  That could be breaking the smooth rhythm of the other 3 to cause the vibration in the pipework.  If you've got a local injector testing place, it might worth be worth having it professionally tested before replacement, depending on costs.

The fuller one is closest to gearbox, I haven’t owned the car too long but you can tell it has been leaking for a long time looking at the dried crud around it, I was hoping that was the reason for the noise but have since freed it, cleaned it up and replaced the copper washer 

2 minutes ago, Baz205 said:

The fuller one is closest to gearbox, I haven’t owned the car too long but you can tell it has been leaking for a long time looking at the dried crud around it, I was hoping that was the reason for the noise but have since freed it, cleaned it up and replaced the copper washer 

That's potentially a different type of leak.  The leak off you're measuring here is in indication of the level of wear inside the injector.  If there's also a leak externally causing a mess around it, that's a separate fault, such as the copper washer or a loose fitting leak off pipe.

1 minute ago, TomsFocus said:

That's potentially a different type of leak.  The leak off you're measuring here is in indication of the level of wear inside the injector.  If there's also a leak externally causing a mess around it, that's a separate fault, such as the copper washer or a loose fitting leak off pipe.

I have fixed that leak now, think it was just the copper washer and it seems good around it now

9 minutes ago, TomsFocus said:

Looks like the 4th injector is leaking off too much.  That could be breaking the smooth rhythm of the other 3 to cause the vibration in the pipework.  If you've got a local injector testing place, it might worth be worth having it professionally tested before replacement, depending on costs.

There is one close so will have to give them a call tomorrow and see 👍

On 10/20/2024 at 1:55 PM, TomsFocus said:

Looks like the 4th injector is leaking off too much.  That could be breaking the smooth rhythm of the other 3 to cause the vibration in the pipework.  If you've got a local injector testing place, it might worth be worth having it professionally tested before replacement, depending on costs.

Failed test on the injector. Problem is they want £200 to recon it, I can get ready reconditioned ones for half that. When coding is it as simple as it looks on forscan by changing the injection correction factor code? 

Yes, it is that simple to code them.

I will say that not all refurbs are done to the same quality though.  Check reviews before buying if possible.

3 minutes ago, TomsFocus said:

Yes, it is that simple to code them.

I will say that not all refurbs are done to the same quality though.  Check reviews before buying if possible.

Thanks, a few do come with reports so will probably chance those types before the ones that just look cleaned up. So expensive by me because they are Bosch specialists not continental 

Injector changed, no difference 😢. Just to ensure it wasn’t another I swapped them all one by one with the previous one I took out as I guessed they should be good injectors! But didn’t change a thing! Guess it’s a garage job 😩

2 garages unable to diagnose it so far! I have just removed the glow plugs though, does this help with anything because they definitely shouldn’t look like this 

Just to update this in case anyone ever has a similar fault. Changed the injection pump and everything is now ok! Must’ve had something wrong on the internals, but either way it’s working well now 😁

Thanks for the update.  I wasn't even really considering the HP pump for this fault.

That's now a HP pump failure on an 8v 1.6 TDCI, 8v 1.5 TDCI and 16v 1.5 EcoBlue on here within the space of a week.  

I'll have to stop recommending these as reliable I think! 🤔 

15 hours ago, TomsFocus said:

Thanks for the update.  I wasn't even really considering the HP pump for this fault.

That's now a HP pump failure on an 8v 1.6 TDCI, 8v 1.5 TDCI and 16v 1.5 EcoBlue on here within the space of a week.  

I'll have to stop recommending these as reliable I think! 🤔 

I think right from the start I had my suspicions but knew it was the more expensive and time consuming fix so hoped not! Plus how it ran didn’t point to a pump running wrongly as you’d assume it was starving of fuel if the pump wasn’t working as it should