Won't start after swapping all injectors for refurbished ones.

[rburnham11]

Hi all.
I have a Mercedes viano 2.2 11 plate. I have removed all injectors and then took them to a injection specialist, I was going to have them all rebuilt and then put them back on however the very knowledgeable chaps there said they already have a refurbished set on the shelf I can swap for.
So now I have installed all the injectors and it won't start. It was running on the original injectors.
I was very careful and clean when installing the new ones.
It turns over but won't fire. I have cracked the fuel line but on each injector to check that fuel is getting to the injector and it is.
I've checked all electrical connections and all appear to be good.
On a diagnostic machine it says low fuel pressure.

Any help with this would be very much appreciated please

 

[mercmancdi]

Hi all.
I have a Mercedes viano 2.2 11 plate. I have removed all injectors and then took them to a injection specialist, I was going to have them all rebuilt and then put them back on however the very knowledgeable chaps there said they already have a refurbished set on the shelf I can swap for.
So now I have installed all the injectors and it won't start. It was running on the original injectors.
I was very careful and clean when installing the new ones.
It turns over but won't fire. I have cracked the fuel line but on each injector to check that fuel is getting to the injector and it is.
I've checked all electrical connections and all appear to be good.
On a diagnostic machine it says low fuel pressure.

Any help with this would be very much appreciated please

Any chance in the line it’s getting air in with you working at it disturbed connecter etc , and no leaks . Hope the injectors he swapped you for are same as your own 100 .%

 

[markjay]

...Hope the injectors he swapped you for are same as your own 100 .%

As above, it's a good idea to compare the MB part numbers of the old injectors with the refurbished ones.

 

[pcthrillrider]

when changing injectors you have to code them to the ecu

 

[m80]

Pretty sure it would start w/o the coding, and for refurb'ed injectors the code on top no longer applies I'm told.

Start by checking the fuel rail pressure when cranking.

These injectors don't like lying down, new one's are wax filled I believe.

 

[optimusprime]

Re fit the old injectors for a start

 

[markjay]

Re fit the old injectors for a start

I'm guessing that the garage swapped his old ones for the refurbished ones, i.e. the OP probably didn't buy the refurbished ones outright.

 

[optimusprime]

Markjay yes never though about that one , and poster never did say .

 

[optimusprime]

Something i would do myself .Remove them all and take them to an injection specalist .

 

[rburnham11]

So I spoke to the injector specialist place, they gave me my old injectors back. Popped those back in and it started and ran as it used to. So next step is take the refurbished injectors back along with my original ones and ask them to refurb the original injectors.

 

[m80]

I paid £668 to refurb mine maybe 18 months ago. Total waste of money, difficult to start and ran like a pig. The refurb guy stated many reasons why there was an issue, none his fault of course.
The original injectors started easily and ran well previously, I wanted to eliminate some smoke.

I bought new from PF Jones for £752. Fired up 1st time and ran well.

I concluded excessive leak off from the refurbed injectors as the fuel pressure was struggling to reach threshold.

Buy new and save time is my thinking.

 

[rburnham11]

To be honest I wish I hadn't bothered with it now. But I'm £600+ in and I'm currently in same position I was in before I started. I think one of the original injectors was potentially duff as 3 came out super easy and one (injector 3) fought me for 2 hours.

 

[m80]

To be honest I wish I hadn't bothered with it now. But I'm £600+ in and I'm currently in same position I was in before I started. I think one of the original injectors was potentially duff as 3 came out super easy and one (injector 3) fought me for 2 hours.

That's where I was.
But since the engine starting and running was worse than before refurb' it suggested a refurb' screw up. Confidence in competence was lost.
To give the chancer a 2nd shot at the injectors was going to mean more money to a guy that may well BS his way out of liability, how would I know? And were it to be working I wouldn't know if any future issue was down to a faulty refurbed' injector.

I do have 4 refurbed' injectors still. At some point I may send them for testing, it may be he fouled up just 1.
But I have 4 new injectors in, they have covered 17k miles since fitting, so should outlast the Gov't's permitted ownership of the Viano.

 

[optimusprime]

You have the electronic type ,I was lucky mine are jusr a brass bar with spring and a fiter inside £15 each [Bosch]

 

[rburnham11]

So little update, and still looking for help please.
I took the reconditioned injectors back and they claimed it was fuel contamination that blocked them all up, I found that incredibly doubtful, they cleaned them out and I put them back in and it started straight away, so I think the injectors were duff when they first sold them to me. It runs.
Except that it's still excessive black smoke out on acceleration, very fumey and poor mpg.

What else could cause this.
Injectors changed, air filter changed.
Boost leak? Not obvious if there is.
Egr? This looks like a pig to get to, any advice on that would be great.
Maf? I have a new one to go on.

Anything else?

Cheers

 

[m80]

Did you get the injectors reconditioned in Wigan by chance?

 

[Petrol Pete]

I have seen the following test carried out . Take injectors out one at a time (electrically disconnect all) connect the one that is out up and aim it into an empty plastic bottle and crank the engine over , it should spray . Repeat for all injectors.

It can get messy and if petrol it is a fire hazard, its pretty unsientific as in volume injected , but it at least shows that they are firing.

 

[ToeKnee]

As above you could crank each injector for the same amount of time and compare volumes in your catch bottle?

 

[Petrol Pete]

legitstreetcars testing injectors - Bing video

www.bing.com

 

[Supernoodle]

You haven't said what lead you to want to refurb the injectors in the first place.
From what I understand you've got the refettled replacement parts on now. So is it any different to how it was on your original injectors?