Technical Qubo 1.3 Multijet 95k engine trouble

[QuoreSportivo]

I have several problems with my Fiat Qubo 1.3 Multijet 2012. I have owned the car for 1 year. I bought it with a relatively low mileage (142,000 kilometers). I don't know if the mileage is real. Immediately after buying it, I replaced the timing belts (they were skipped by one tooth) and changed the oil. Then I replaced all the washers under the injectors because diesel was leaking from under the injectors on two cylinders and the engine was running too rough and had high corrections. Then I flushed the engine with BG EPR because the new oil was immediately black. And new oil went into the engine again. The engine's performance improved but the injectors still had a bad sound even though the corrections on the injectors were better. I bought all 4 new ones and we also sealed all the leaks on the injectors. I had the original engine control unit software uploaded because we found that it was modified in various ways. So I currently have the distribution replaced, the engine flushed, new oil now with about 2000km of mileage, all 4 new injectors and no diesel leaks, EGR turned off, DPF active (regenerations work).

However, after starting the engine, I can still hear a relatively rough sound until the engine warms up. We looked at the injector corrections today. On cylinder number 1, the corrections were about 0.70, on cylinder number 2 0.40, on cylinder number 3 1.20, on cylinder number 4 0.04. Gradually, as the engine warms up, especially on cylinder number 3, the corrections noticeably improve to somewhere around 0.70 and the engine still hasn't warmed up to full temperature. When the engine is warmed up to operating temperature, it runs clean and quiet. What could be causing this?

The second problem is the DPF regeneration process itself. Regeneration is quite frequent and always accompanied by a lot of smoke from the exhaust. The smoke is slightly blue. It doesn't smell like coolant, I'm not losing it. It doesn't smell like diesel either. It's more like it's burning a certain amount of oil. I'm not losing oil, but I suspect that my oil volume is increasing. Which is also not right. Have you ever encountered an increase in the amount of oil, or such strong smoke during DPF regeneration?

The new oil applied after flushing the engine was immediately completely black again and it also seems to me that there was quite a lot of pressure coming from the PCV hose connected to the airbox after disconnecting it. I want to find another car with a 1.3 Multijet to find out how strong the pressure is from the PCV hose.

I plan to flush the engine again with BG EPR, then use new oil (some cheap 10w40) and then, after driving some distance, drain the oil again and pour back in Selenia 5W30.

I am attaching a photo of the smoke from the exhaust during DPF regeneration and the color of the oil after flushing the engine and driving about 20km.

I will be grateful for all advice and any help.

 

[bugsymike]

I have several problems with my Fiat Qubo 1.3 Multijet 2012. I have owned the car for 1 year. I bought it with a relatively low mileage (142,000 kilometers). I don't know if the mileage is real. Immediately after buying it, I replaced the timing belts (they were skipped by one tooth) and changed the oil. Then I replaced all the washers under the injectors because diesel was leaking from under the injectors on two cylinders and the engine was running too rough and had high corrections. Then I flushed the engine with BG EPR because the new oil was immediately black. And new oil went into the engine again. The engine's performance improved but the injectors still had a bad sound even though the corrections on the injectors were better. I bought all 4 new ones and we also sealed all the leaks on the injectors. I had the original engine control unit software uploaded because we found that it was modified in various ways. So I currently have the distribution replaced, the engine flushed, new oil now with about 2000km of mileage, all 4 new injectors and no diesel leaks, EGR turned off, DPF active (regenerations work).

However, after starting the engine, I can still hear a relatively rough sound until the engine warms up. We looked at the injector corrections today. On cylinder number 1, the corrections were about 0.70, on cylinder number 2 0.40, on cylinder number 3 1.20, on cylinder number 4 0.04. Gradually, as the engine warms up, especially on cylinder number 3, the corrections noticeably improve to somewhere around 0.70 and the engine still hasn't warmed up to full temperature. When the engine is warmed up to operating temperature, it runs clean and quiet. What could be causing this?

The second problem is the DPF regeneration process itself. Regeneration is quite frequent and always accompanied by a lot of smoke from the exhaust. The smoke is slightly blue. It doesn't smell like coolant, I'm not losing it. It doesn't smell like diesel either. It's more like it's burning a certain amount of oil. I'm not losing oil, but I suspect that my oil volume is increasing. Which is also not right. Have you ever encountered an increase in the amount of oil, or such strong smoke during DPF regeneration?

The new oil applied after flushing the engine was immediately completely black again and it also seems to me that there was quite a lot of pressure coming from the PCV hose connected to the airbox after disconnecting it. I want to find another car with a 1.3 Multijet to find out how strong the pressure is from the PCV hose.

I plan to flush the engine again with BG EPR, then use new oil (some cheap 10w40) and then, after driving some distance, drain the oil again and pour back in Selenia 5W30.

I am attaching a photo of the smoke from the exhaust during DPF regeneration and the color of the oil after flushing the engine and driving about 20km.

I will be grateful for all advice and any help.

Are you mainly doing short journeys, I am finding on many small diesels that they cannot carry out a full DPF Regen before journey is stopped resulting in oil quickly contaminated, error codes on dash and poor performance along with the white smoke.
Making sure engine quickly gets to 90 degrees Centigrade (centre of temp gauge), using DPF cleaner additive with every tank of fuel plus a good 30 mile journey at 2-3000 rpm once a month helps, but the real issue is small diesels with emission controls do not like driving in town on short journeys as unsuited to it and car salesmen if they had any integrity would tell the customers the truth!

 

[QuoreSportivo]

Are you mainly doing short journeys, I am finding on many small diesels that they cannot carry out a full DPF Regen before journey is stopped resulting in oil quickly contaminated, error codes on dash and poor performance along with the white smoke.
Making sure engine quickly gets to 90 degrees Centigrade (centre of temp gauge), using DPF cleaner additive with every tank of fuel plus a good 30 mile journey at 2-3000 rpm once a month helps, but the real issue is small diesels with emission controls do not like driving in town on short journeys as unsuited to it and car salesmen if they had any integrity would tell the customers the truth!

Yes, I drive my car mostly on short routes up to about 3km. I need to carry goods for my shop with me every day and walking is not possible. I use a scooter on warm days, but during cold days and bad weather I have to drive a car. I didn't want to buy a petrol Qubo because of the Peugeot engine used in those years, which has low power and high consumption. All newer models with a petrol Fire engine from Fiat are already the same price as a Doblo... and the small Qubo suits me better in the city. In addition, I planned to drive the car on longer routes and I was looking forward to the fact that I would have lower consumption on these routes with a diesel. However, so far I have only had problems with the engine. The previous owner destroyed the original DPF, banned regeneration and installed the cheapest aftermarket DPF from Kamoka in the car before selling it. I drove for half a year without knowing about the deactivated DPF regeneration. That's why I thought that after all the service that was done, when the engine is at its original setting and I have new oil, new injectors and DPF regenerations will be activated again, it will finally work properly. However, the opposite is true. Although the diesel no longer flows through the overflows, the engine has a nicer sound, better performance, lower consumption, but the DPF smokes extremely during combustion and the corrections on the injectors are very bad after starting and only improve after the engine warms up. I always start the DPF regeneration in the city center and the smoke is very big. I live in a city where there is very little flat land and we always go up or down hills. So every time I go up the city, the engine warms up and starts the regen with a big smoke screen. If I turn around before the regen is finished and go down the city, the regen stops because it does not have enough temperature, since the engine is not in gear and not even at idle, because I have a gear engaged and I brake the engine.

 

[bugsymike]

Yes, I drive my car mostly on short routes up to about 3km. I need to carry goods for my shop with me every day and walking is not possible. I use a scooter on warm days, but during cold days and bad weather I have to drive a car. I didn't want to buy a petrol Qubo because of the Peugeot engine used in those years, which has low power and high consumption. All newer models with a petrol Fire engine from Fiat are already the same price as a Doblo... and the small Qubo suits me better in the city. In addition, I planned to drive the car on longer routes and I was looking forward to the fact that I would have lower consumption on these routes with a diesel. However, so far I have only had problems with the engine. The previous owner destroyed the original DPF, banned regeneration and installed the cheapest aftermarket DPF from Kamoka in the car before selling it. I drove for half a year without knowing about the deactivated DPF regeneration. That's why I thought that after all the service that was done, when the engine is at its original setting and I have new oil, new injectors and DPF regenerations will be activated again, it will finally work properly. However, the opposite is true. Although the diesel no longer flows through the overflows, the engine has a nicer sound, better performance, lower consumption, but the DPF smokes extremely during combustion and the corrections on the injectors are very bad after starting and only improve after the engine warms up. I always start the DPF regeneration in the city center and the smoke is very big. I live in a city where there is very little flat land and we always go up or down hills. So every time I go up the city, the engine warms up and starts the regen with a big smoke screen. If I turn around before the regen is finished and go down the city, the regen stops because it does not have enough temperature, since the engine is not in gear and not even at idle, because I have a gear engaged and I brake the engine.

All I can suggest is the things I said before and the reasons for them, it does help providing you can do all the things I suggested.
It's worth trying.
It's not just Fiat, one of my daughters has the same issue with a VW Golf 1.6 diesel and short journeys, the additive and a good fast run once a month with engine revs between 2-3000 so the Regen can work properly even if it means staying in a lower gear to achieve it and without stops as the Regen fails then.