V50 D2 Engine stutter/hesitation

[Petey80]

Originally Posted by jobbzz

Are you able to log every sensor output simultaneously using the vida software? This might help diagnosing issues which are not necessarily related to an error code. I recently had some trouble which turned out to be my fuelfilter, yet no error codes showed up. Although I own a C30 the engine should be exactly the same.

You can look at 10 things at once using Vida, but I guess it's knowing what things to look at.

[jobbzz]

I would start with "commanded throthle actuator" "maf airflow", "dpf differential pressure", "fuelrail pressure", "rpm", "speed", throthle position (doesn't seem to work on mine though), "battery voltage", "requested alternator voltage", and perhaps some values related to the turbo. That should cover a pretty wide range of potential causes.

Edit: or just be patient and see what the garage says on Tuesday

Cheers

[Petey80]

Thanks for the hint Jobbzz, might have a look at those tonight whilst I'm driving home.

[jobbzz]

Sure I just forgot to mention it might be a slow/stuck EGR valve as well. Especially since it occurs just after gear shifts. When you press the clutch the engine is not under load so it opens the egr valve to recirculate the exhaust flumes but then when you hit the throttle again it doesn't close properly so you experience a lack in power. You won't necessarily experience this pulling away from standstill because the EGR should be closed during idling

You can check the actual EGR position vs the commanded position which should follow each other pretty closely. I would expect an error message though if this deviate to much, but that is just my opinion.

[pdig]

Hello.

My 2007 1.6 petrol V50 had a stutter. The cause was a faulty accelerator pedal sensor.

[Petey80]

Originally Posted by pdig

Hello.

My 2007 1.6 petrol V50 had a stutter. The cause was a faulty accelerator pedal sensor.

Something to think about. Going to hook it up to Vida tonight, see if any new fault codes have appeared.

Very strange how it only happens at 1600-2000rpm along with the electronic sounding whine.

[Petey80]

Could a bad alternator cause these issues?

Just hooked it up to Vida there and whilst running battery voltage is at 12.6v

[jobbzz]

Originally Posted by Petey80

Could a bad alternator cause these issues?

Just hooked it up to Vida there and whilst running battery voltage is at 12.6v

Can imagine some solenoids don't fancy such "Low" voltages and also explain that wining noise you hear

[Petey80]

Dropped off first thing and called me just after 10am.

2 injectors and an alternator.

They say the misfire is from the injectors and the whine is the alternator.

I'll speak in more detail with them tonight when I pick the car up.

[Baker3570]

Originally Posted by Petey80

Dropped off first thing and called me just after 10am.

2 injectors and an alternator.

They say the misfire is from the injectors and the whine is the alternator.

I'll speak in more detail with them tonight when I pick the car up.

Did the new injectors sort this issue? ive just bought a V50 2.0D and noticed when driving 60/70mph between 1600rpm / 2000rpm in 5th feels like abit of a misfire / judder? is this how your car was?

Cheers