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Volvo s40/v50 2.0D hard start

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Old Apr 26, 2023 | 04:10 PM
  #1  
JoaoS40's Avatar
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Default Volvo s40/v50 2.0D hard start

Hi guys,
i'm new here and I've searched for any thread related to this without luck.

Here's the situation 2 Volvos, one s40 II and one v50 from 2005 and 2007.
Same engine 2.0D 136hp the same used in ford, psa etc..
Both no defaults or weird values except the v50 which marks on the intake temperature sensor -40º.

The S40 sometimes when it stays a long period of time without working and the weather is a bit cold (3 to 10 Celcius), it starts but instantly shuts down BUT if you try it again instantly if you want it will start like a 0km car.

The V50 when it's cold or it stays a long period of time without working its really hard to start, it has two dead glow plugs (but my car for example with the same engine had 4 of them burned and started like butter on summer even when cold), the intake air temperature marks -40º, it has no air on tubes. I checked the synchronism its fine, fuel rail pressure perfect, rpm is around 300, injectors have a nice value although i didn't check the return line, i bypassed the EGR, it has no DPF and i checked the phonic wheel for damage.

I'll try to keep the post updated on the latest information.


 
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Old May 3, 2026 | 01:48 PM
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Hello João. Did you ever solve your problem on the V50?
I have the same problem on my 2005 V50 2.0D.
From what I understand, the ECM only turns on the output injector stage when there is enough pressure and if RPM is minimum 350 rpm.
I notice I am just under 300, but I have a good battery, but maybe the starter could use some cleaning.
I also notice that in VIDA there is the front temperature sensor catylitic converter and rear, which both read 100 C when cold, even though my Volvo does not have these sensors.
I am going to see tomorrow to measure the air intake temperature.
But the problem does seem temperature related, since after the first cold start, it starts fine. If I spray a bit of brake cleaner in the induction pipe, its starts much easier.

Over and out
Carnaxide
 
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Old May 3, 2026 | 03:17 PM
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JoaoS40's Avatar
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Originally Posted by frenchcon
Hello João. Did you ever solve your problem on the V50?
I have the same problem on my 2005 V50 2.0D.
From what I understand, the ECM only turns on the output injector stage when there is enough pressure and if RPM is minimum 350 rpm.
I notice I am just under 300, but I have a good battery, but maybe the starter could use some cleaning.
I also notice that in VIDA there is the front temperature sensor catylitic converter and rear, which both read 100 C when cold, even though my Volvo does not have these sensors.
I am going to see tomorrow to measure the air intake temperature.
But the problem does seem temperature related, since after the first cold start, it starts fine. If I spray a bit of brake cleaner in the induction pipe, its starts much easier.

Over and out
Carnaxide
Hello,
The problem is still present,
i changed the intake sensor but it didn't solve the problem.
Every time i go to work for example, at the end of the day when leaving the car starts and the rpm rise super slow while shaking just a bit the engine.
My injectors aren't old and the pump was repaired. I also installed a new fuel filter body, maybe some air was getting inside the system i don´t know.
Still no defaults, my EGR was removed with a delete kit, i think the car lost a bit of power. Nothing major but i feel its slower.
I'm going to change the throttle body to see if there's any changes. Its made of plastic and i believe its not in the best conditions.
 
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