Re: Mazda CX-5 2.2 SkyActiv-D - DPF filling fast
Posted: Mon May 27, 2024 1:26 pm
Sometimes the sensor pipes for Exh Pressure sensor 1&2 become blocked.
Remove senseors from rubber pipes and trickle some washing up liquid and water down them. Also remove the MAP sensor and check if its covered in carbon, this will sometimes cause juddering of engine when starting from stop as the ECU does not receive the correct signal.
This can be cleaned with washing up liquid, then lightly with an old tooth brush. If you are rough and you damage the sensor then you will need a new one.
Using a endoscope attached to a tablet or phone with the software you can use the MAP sensor hole to inspect No.1 inlet port and valve for carbon build up, itvwill look like ice as the black turns white in the lights.
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It is quite easy with a very modest tool kit to remove both EGR valves ( one is a bypass) the pipes you take off and the EGR cooler just using washing up liquid and water , tooth brush. The cooler you can attatch a blank one end and add the soap and water, keep giving it a shake, best left for a few hours and use boiling water first time. If you can leave it over night , even better, then rinse outwith a garden hose( you don't need a pressure sprayer) until it runs clear.
Reassemble adding a smear of Copper based grease to all the threads. This should be standard practice when working on the car
If you think your DPF is blocked, it could be something to do with either the sensor pipes or bad combustion. You can add washing up liquid and water via the two HP side sensor tubes as they attach at the begining of the DPF , after the CAT and the soap will help dissolve carbon in the DPF. Best done over a weekend , keep adding the liquid. The No.1 Exh Pressure sensor is attached to the DPF via a banjo and banjo screw and these have been known to block up.
The banjo is removable , but its very difficult to reach from the top, so if you can clean it chemically and check it occassionaly that will help.
They are a good car apart from a few of these maladies. One person I know when he removed the banjo screw, drilled the hole out slightly, reducing the chance of blockage, but don't go overboard.
A lot of town driving are the death of these engines.
Have a look at this chaps videos, he is very good.
https://youtu.be/77sm3p-4uuQ?si=CN4qx0Q36GTTPoz1
He mainly only deals with Mazdas and 2.2d's in any of the cars that have them. He has a lot of videos out on U-tube on various 2.2D problems, so worth a look.
Remove senseors from rubber pipes and trickle some washing up liquid and water down them. Also remove the MAP sensor and check if its covered in carbon, this will sometimes cause juddering of engine when starting from stop as the ECU does not receive the correct signal.
This can be cleaned with washing up liquid, then lightly with an old tooth brush. If you are rough and you damage the sensor then you will need a new one.
Using a endoscope attached to a tablet or phone with the software you can use the MAP sensor hole to inspect No.1 inlet port and valve for carbon build up, itvwill look like ice as the black turns white in the lights.
- Partially carboned inlet valve
- 20240508124848489.jpg (111.59 KiB) Viewed 2455 times
It is quite easy with a very modest tool kit to remove both EGR valves ( one is a bypass) the pipes you take off and the EGR cooler just using washing up liquid and water , tooth brush. The cooler you can attatch a blank one end and add the soap and water, keep giving it a shake, best left for a few hours and use boiling water first time. If you can leave it over night , even better, then rinse outwith a garden hose( you don't need a pressure sprayer) until it runs clear.
Reassemble adding a smear of Copper based grease to all the threads. This should be standard practice when working on the car
If you think your DPF is blocked, it could be something to do with either the sensor pipes or bad combustion. You can add washing up liquid and water via the two HP side sensor tubes as they attach at the begining of the DPF , after the CAT and the soap will help dissolve carbon in the DPF. Best done over a weekend , keep adding the liquid. The No.1 Exh Pressure sensor is attached to the DPF via a banjo and banjo screw and these have been known to block up.
The banjo is removable , but its very difficult to reach from the top, so if you can clean it chemically and check it occassionaly that will help.
They are a good car apart from a few of these maladies. One person I know when he removed the banjo screw, drilled the hole out slightly, reducing the chance of blockage, but don't go overboard.
A lot of town driving are the death of these engines.
Have a look at this chaps videos, he is very good.
https://youtu.be/77sm3p-4uuQ?si=CN4qx0Q36GTTPoz1
He mainly only deals with Mazdas and 2.2d's in any of the cars that have them. He has a lot of videos out on U-tube on various 2.2D problems, so worth a look.
