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-   -   '05 v70 D5 hard start and rough idle (https://www.volvoforums.org.uk/showthread.php?t=317349)

Gerthen Jun 4th, 2021 15:41

'05 v70 D5 hard start and rough idle
 
Hi all. My car developed the following issues, hope someone has any experience with something similar.
Its hard to start, both hot and cold, it cranks for 3-4 seconds without any signs of starting and then just starts up really fast and rough
Also the idle is very rough, the whole car is shaking back and forth, revs are quite stable around 700, when driving, it seems smooth.
Ran a vida test and this is what came up
https://i.postimg.cc/TY9vPqCZ/Waru0cR.jpg
Cleared the faults, only the ccm-0040 and uem-0004 show up, but the issue still persists.
Any help is appreciated

cheshired5 Jun 4th, 2021 16:06

You need to plot a graph (open graphic display) in ECM >Parameters during cranking showing rpm, fuel pressure, battery voltage, engine coolant temperature and mass airflow.

Gerthen Jun 4th, 2021 16:48

didn't start on first try, it does this sometimes, seems like it started, but then dies when you let go of the key. started on the second try
https://i.postimg.cc/5yqs9gqy/Screenshot-184.png

cheshired5 Jun 4th, 2021 18:39

Looks to me like rail pressure isn't building high enough quickly enough.
When was the fuel filter last changed and with what brand?

If the filter is good, next job is a leak back test on the injectors.

Gerthen Jun 4th, 2021 18:59

Fuel filter was changed probably around 80k km ago. Dont remember the brand though. Gonna change it out and see

cheshired5 Jun 4th, 2021 19:41

If you can, either use genuine Volvo or use Mann, Mahle, Knecht, or Purflux who all make the genuine filters.

I would also recommend using the correct type of tool like the one shown in this video.


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