Garage saying car won't start after fuel injector replacement, why ? (2010 3.0 V6 eclass )

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KramEkard

Active Member
Joined
Jul 25, 2023
Messages
71
Location
Lancashire
Car
2010 Mercedes E350 3.0 v6
Car 2010 Mercedes eclass . Had a Nightmare with injectors and seals .

Leak off pipe snapped When pulling if off injectors.
2 fuel injectors had to be replaced

2 snapped injector bolts when tightening down the bolts due to neighbour setting torque wrench to high

Failed job by my friend to drill them out

Car would turn over but not start , assumed airlock

Tried to recode the 2 replacement injectors but seems it erased all 6 of the codes and couldn't seem to get them back , ( maybe with weak battery making it look as though the codes were erased )
The numbers are not visible on 3 of the injectors .


Had car recovered to engine repair garage (£100)

Garage called today told me 2 injectors are now in it's £420 for the snapped bolts being sorted

Also told me the car won't start which I assume is airlock but they said they'd tried awhile and still can't get it to start and I told them to carry on with it ( don't know how expensive going to get )

Does anyone have any ideas to why this might be happening ? Car was running before taking injectors out .

Thank you
 
Does anyone have any ideas to why this might be happening ? Car was running before taking injectors out .
I'm afraid that based on just the description it's difficult to make a constructive suggestion as to what specific issue is casing the engine not to fire up. The last thing you need is another "I've got this" type, telling you their guess is your answer.
But fwiw this thread may be a good "cautionary tale" for anyone tempted by the "my mate's got some spanners, he can do it for cash in hand" line..

BTTT
 
When I had a similar issue with my CDI 270 engined Jeep no amount of bleeding could get it to run. A five second blast of easy start through the inlet while cranking has it running within seconds. I think the pumps just don't generate enough pressure at cranking speed with air in the lines. Try and avoid excessive cranking if it does not start.....the diesel flowing through the pumps are their only lubricant.
 
The 270 wouldn't have had a lift pump.
This one would be easy to prove the lift pump was supplying fuel as it should.
 
Good call m80 , Some models of transit vans had a similar thing. The fuel level sensor in the tank fails , van thinks the tank is empty and shuts off the lift pump so air doesn't get sucked in to the high pressure side .

Not sure what mechanics the OP is using , I guess it's cranking but no start, any decent mechanic shop should be able to get it going.
 
Good call m80 , Some models of transit vans had a similar thing. The fuel level sensor in the tank fails , van thinks the tank is empty and shuts off the lift pump so air doesn't get sucked in to the high pressure side .

Not sure what mechanics the OP is using , I guess it's cranking but no start, any decent mechanic shop should be able to get it going.
I would have thought they could diagnose the issue at least.

For me,
look for codes,
check fuel is where you would expect,
then look for excessive leak off, at 1 or more injectors.

But a diagnostic check would see failure to reach threshold fuel pressure, to permit a start. Simple diagnostic readers can do that.
 
£600 later ( well , £1,200 including the whole process of injector seals including before I had it recovered to garage to get drilled bolts out ) for drilling out 2 injector bolts and including recovery there and back the car won't start , garage say they don't know why and said they needed the space back but they were saying at first seems no compression then saying no fuel pressure but was running fine before I took injectors out to do the injector seals.
 
Could maybe the 2 replacement injectors be faulty ?? I don't want to be taking them out it's just cost £600 putting them back in
Also it's lost the injector codes and I can't write them back in cos it's faded off the injector
 
Even if there were two not "injecting" then i would have thought the engine would still start , of sorts , on four working injectors.

Before you go down the "rabbit hole" again , get the vehicle to a recommended MB specialist who can interrogate the car properly , not the time to be playing repair roulette again as the last time you did - it hurt.

K
 
Car 2010 Mercedes eclass . Had a Nightmare with injectors and seals .

Leak off pipe snapped When pulling if off injectors.
2 fuel injectors had to be replaced

2 snapped injector bolts when tightening down the bolts due to neighbour setting torque wrench to high

Failed job by my friend to drill them out

Car would turn over but not start , assumed airlock

Tried to recode the 2 replacement injectors but seems it erased all 6 of the codes and couldn't seem to get them back , ( maybe with weak battery making it look as though the codes were erased )
The numbers are not visible on 3 of the injectors .


Had car recovered to engine repair garage (£100)

Garage called today told me 2 injectors are now in it's £420 for the snapped bolts being sorted

Also told me the car won't start which I assume is airlock but they said they'd tried awhile and still can't get it to start and I told them to carry on with it ( don't know how expensive going to get )

Does anyone have any ideas to why this might be happening ? Car was running before taking injectors out .

Thank you
Best thing , before throwing money at it would be to get the codes read ( and old stored ones cleared ) by someone with the right diagnostic equipment and the knowledge how to use it correctly .

Anything else is guesswork and could get very costly , doing unnecessary work or replacing perfectly good parts .

And if the injectors need re-coding , get them to do it .
 
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I went to a fuel specialist this morning as soon as I told him he seemed to know with certainty said I need to bring all 6 injectors to him and they need putting on his machine because it's not started in so long , then he said the car should run after that
 
I went to a fuel specialist this morning as soon as I told him he seemed to know with certainty said I need to bring all 6 injectors to him and they need putting on his machine because it's not started in so long , then he said the car should run after that

Beginning to think this thread is a wind-up.

So now you are going to remove all six injectors , after the problems you have had , take them to someone who "seemed" to know what they are talking about , install them , after the problems you have had, and hope for the best - good luck with that.

You ask many questions and get accurate sensible words of guidance yet you still persist on ignoring them , so with those words - i am out.

K
 
I went to a fuel specialist this morning as soon as I told him he seemed to know with certainty said I need to bring all 6 injectors to him and they need putting on his machine because it's not started in so long , then he said the car should run after that
Just what is a "fuel specialist"?

The more I hear the less I believe.
 

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