Ticking sound and white smoke

[Yullia]

My Mazda 2016 CX-3 1.5L Diesel has several problems: Knocking (a ticking sound) when pressing the accelerator and brief white smoke from the exhaust during startup. Injector adaptation temporarily helps, but the issues return after about 30 km.

The DPF and EGR systems were recently removed. The injectors and the entire fuel system have been thoroughly checked and confirmed to be in good condition. Despite all this, the problems persist.

Has anyone else experienced similar issues?

 

[Carlos T]

Hello.
I have the exact same noise. It happens between 1000rpm and 1500rpm by pressing the accelerator lightly and white smoke from the exhaust during cold startup .

It started to happen sometimes and would disappear for a while but now is always there. Just like you, DPF and EGR were removed, injectors and the entire fuel system have been thoroughly checked and the problems persists.

One thing i've noticed is that i-stop is not working (sometimes it works out of nothing) and that leads me to believe that the knocking sound has something to do with the reprogramming of the ECU (car computer) after DPF delete and is messing with fuel injection timing or performing ghost regeneration of the DPF thinking is still there.
Either that or something with injectors (despite test machine says otherwise) or carbon build up somewhere.

Did you get to find out what was causing that knocking sound?

Thanks