Injectors!!

[Dwg_23]

Hello all! I have a 2005 c220cdi
I have a small misfire/splutter at low revs while driving

Plugged into star--no codes

Injector values

Injector 1 -1.47
3 -2.64
4 +2.39
2 +1.71

Garage thinks number 4 can cause the splutter and maybe number 2 is high as its trying to compensate?

Your thoughts please! Thanks guys

 

[mersum1es]

Star also says, value which requires a new injector is more than 5. From reading experiences, around 3 values may cause starting problems etc. so not necessarily caused by those injectors.

 

[Dwg_23]

I'm just getting a misfire/ hesitation at very low revs on motorway ect, no codes have come up on 2 plug ins, do you think the injector could cause a misfire at these values?

 

[mersum1es]

complete 'misfire' sounds very odd, some irregular rpm is more like usual. Perform a return leak test to the injectors, correction value does not always correspond with those results.

 

[drdre78]

last time you change fuel filter?

 

[mattkh]

Star also says, value which requires a new injector is more than 5.

Hi
Please enlighten me. What are these numerical values ?

 

[Dwg_23]

Fuel filter was changed recent, garage can't find anything,

 

[mersum1es]

Hi
Please enlighten me. What are these numerical values ?

It's more like balancing the difference between the cylinder, as you see sum of the values is near 0.

 

[Dwg_23]

Replaced injector 4 and that has gone back to minus now
But cylinder 2 has gone up a touch to 2.8 so Maybe that one needs doing now

 

[Dwg_23]

Replaced injector 4, injector 2 has gone to +3 now, rough running and a knocking since swapping injector 4 for a refurbished unit??

 

[mattkh]

Hi
Please put up a picture of an injector that you have removed. Cheers.

 

[Dwg_23]

Hi it's been the garage I haven't got them,