520 replies to this topic

[Deathrow]

I don't know how feasible this is but it doesn't sound like it's been tried if it is possible.

 

Have you tried swapping one of the known good injectors in to the bad cylinder? If it then still runs but starts to die when you disconnect the bad cylinder, you know the cylinder is good and the replacement injector you got is still bad. It's also opportunity to test the replacement injector in a known good cylinder.

I hope you followed that, I almost got lost myself!

 

Process of elimination is key and it sounds like you've been through the majority of the rest of it. I want to see you succeed as you've put alot of effort in already!

[Ben_O]

I don't know how feasible this is but it doesn't sound like it's been tried if it is possible.

 

Have you tried swapping one of the known good injectors in to the bad cylinder? If it then still runs but starts to die when you disconnect the bad cylinder, you know the cylinder is good and the replacement injector you got is still bad. It's also opportunity to test the replacement injector in a known good cylinder.

I hope you followed that, I almost got lost myself!

 

Process of elimination is key and it sounds like you've been through the majority of the rest of it. I want to see you succeed as you've put alot of effort in already!

Thanks Adam,

I really want to see it done if possible.

 

What you suggested makes perfect sense and i am going to give it a try tomorrow.

 

as i said in my previous post, i didn't have the new injector seated correctly when i first fitted it and it was puffing round the base which i don't think would happen if there was no compression, that together with the fact the injector i removed was clogged up with carbon on the tip makes me think now that there is no signal to the injector and that no fuel is being injected into that cylinder.

 

here is hoping anyway! I need to take another look at the wiring and i have a diagnostic lead on its way to plug it in and see what turns up.

 

Cheers

 

Ben

[jime17]

[quote name="Ben_O" post="3146287" timestamp="1412004712"
Not too sure what you mean by Does it run on all 4 using ether?
 
Cheers
 
Ben[/quote]

Sorry by ether I mean easy start... Showing my age.

Also, im assuming that even if it was puffing with the injector not seated correctly, there still might not be enough compression to cause diesel to combust. Id imagine it needs decent compression to do that...

Also... Im not sure ELM code reader will work with a diesel of that age... Again, im no authority so don't take all this as gospel.

[jime17]

Just re read all the posts again Ben...

Bear with me on this..

A while back my scenic dci had a fault that showed on fault codes as cam shaft sensor fault... The sensor was changed but the fault persisted and the car wouldn't start consistently and the codes were still present

After ages and ages of trying everything possible, the mechanic checked for 12v at the sensors plug which only showed a reading that fluctuated at around 5v.

He then tested the appropriate wire further back in the loom and got 12v.

the supply wire was common for various sensors and as it went past each one on its was round the engine bay, there was a tee from the main supply to that sensor.

It turned out that the junction between the sensors supply and the main feed had gone HR.

He took a feed from the next nearest sensor which I think was fuel rail pressure sensor and bingo. Codes cleared and started on the button.

Maybe the feed wire to that injector plug is high resistance between there and the ecu?

Sorry for the long story...

[Shifty]

Cut your losses and get rid, you're just chucking good money(and time after bad)

 

Since you don't really know what actually happened to cause the fault you're just guessing, equally you don't know who else has been messing before you either.

 

At the moment it looks like you can get out of this without losing money.  The car simply isn't worth this much effort or time either.

[ANON]

looking at the state of the air filter the car has never been looked after, stop wasting your time and money and just weigh it in!!

[Carlos W]

I'm going to disagree.

 

How long will it take to swap injectors over? The engine doesn't run any better/worse when you unplug the injector on that cylinder which means either the injector isn't working or there is a problem with that cylinder (burnt out valve, head gasket, knackered rings etc) or, there is a wiring/communication fault.

 

So, you swap an injector which does make a difference when you unplug it onto that cylinder, and put the replacement injector into that cylinder. 

 

What happens?

 

The fault moves to the cylinder you've put the replacement injector in - then your replacement injector has issues.

 

The fault remains on the cylinder which isn't firing at the moment - the fault is something else.

 

What have you wasted?

 

An hour maybe!

[Ben_O]

I am going to try and get this done tomorrow as a last ditch attempt. It will only take 10 mins to swap them over providing they are not seized into the head which is a common problem with these engines.

 

one thing that gives me confidence is that the one i have already replaced came out easily and the injector the other end has been replaced earlier this year. I shall swap them two over to check.

 

Thing is, i have got to prepare my 106 and mother in laws Xsara for MOT's and the xsara needs some work doing do it will have to be when i get a chance. Plus i have other stuff to do. I might give it a try first thing in the morning.

 

Cheers

 

Ben

[Shifty]

The thing with messing about with stuff like this that unless its something really simple you'll just end up chasing problem after problem.  If it was an easy fix the guy would have done it.

 

If it was a case of the seller not being arsed then you would probably have found the fault by now...

 

All this points to a money-pit...................

[Deathrow]

Whichever injector you previously disconnected that caused the engine running to notably change, that would be the one I swapped with the suspect injector/cylinder. You know for a fact that injector is having an effect on the engines running. Just a thought .

Good luck with it and my fingers are crossed for you. I find a lot of satisfaction in getting to the root of a problem and I'm not sure it's always about the cost.

[Ben_O]

Well this last test won't cost nowt and at that point i will cut my losses

[Deathrow]

But Sean, we're on a Mini forum...we've all got money sucking black holes hidden away somewhere. I hate to think of the thousands I've spent on Elliot and she's only given me 12 months of motoring.

Compare that to my current car, which I've put 20k on in the last 2 years but whenever it costs me money all I do is moan about it! Haha.

[Ben_O]

Whichever injector you previously disconnected that caused the engine running to notably change, that would be the one I swapped with the suspect injector/cylinder. You know for a fact that injector is having an effect on the engines running. Just a thought .

Good luck with it and my fingers are crossed for you. I find a lot of satisfaction in getting to the root of a problem and I'm not sure it's always about the cost.

It's not really costing me very much and i have been told what parts will sell well and for what price if i do break it. If the prices are right and i sell them ok, i will get around £400 back.

 

The only thing that is really making me want to sort it is the car is perfect for my needs and i can't afford £800 for a good one that is ready to go.

 

This currently owes me £215

[Shifty]

I'm brutal with cars, they have a 2 strike rule and then they're gone!!!

[Carlos W]

If you fix the Scenic then at least you've got a car to get around.

 

I completely agree with Adam