S40 (New) Engine 2.0D : Engin does not want to start

[Barend]

Originally Posted by S40Matt

Have you tested your crankshaft sensor?

http://www.volvoforums.org.uk/showthread.php?t=173812

This is worth checking, but could still be an injector issue, just hoping its not.

Do you perhaps know what the resistance reading on this sensor must be?

[S40Matt]

Originally Posted by Barend

Thanks Matt, can you tell me where to find the sensor? The only sensor that I manage to find is if I jack up the car, underneath the engin on the left side (when you stand infront of the car) just behind the bottum pulley, is a sensor that is held inplace with one bolt. Or is it on the gearbox side?

That is the one.

For testing see the ehow link within the link I gave you.

[Barend]

Originally Posted by S40Matt

That is the one.

For testing see the ehow link within the link I gave you.

Thanks, will check it now

[Barend]

Originally Posted by Barend

Thanks, will check it now

It looks like that sensor is good, I checked again for voltage on the injector plug, but there is no voltage there.

[S40Matt]

No voltage on all or 2 of the injector plugs?

[Barend]

Originally Posted by S40Matt

No voltage on all or 2 of the injector plugs?

I can't seem to find an earth or voltage on any of the plugs.

[S40Matt]

Have you had or do you have any way to get the codes read? I expect you will have some faults logged that would give a better idea what is happening.

I'm not sure the injectors have a supply like a petrol injector, as they are switched on both the positive & the ground side by law, so testing for a supply may not work.

IF the injectors are indeed not being pulsed by the ECU, there are a couple of likely causes. It could be a failed crank sensor, so the ECU doesn't even know the engine is turning over therefore it not opening the injectors.

It could be a failed fuel supply pump, HP or LP, this would lead to a lack of fuel pressure during cranking, insufficient pressure will cause the ECU to not open the injectors as there's no point just dribbling fuel in.

Fuel pressure sensor, if this goes faulty then engine will not start as it thinks no fuel pressure, You could try unplugging the sensor to fool the system into trying to start?. I'm not 100% sure that this will allow start in limp mode or not but worth a try.

If the engine is not turning over fast enough then insifficient fuel pressure is created by the slow turning HP pump, the ECU won't activate the injectors.

[Barend]

Originally Posted by S40Matt

Have you had or do you have any way to get the codes read? I expect you will have some faults logged that would give a better idea what is happening.

I don't have all the codes with me, I'm waiting to get the other ones.

There was these to

P0001
P0092

[S40Matt]

Originally Posted by Barend

I don't have all the codes with me, I'm waiting to get the other ones.

There was these to

P0001
P0092

Those codes could indicate a faulty fuel pressure regulator.