Yung buga ng injectors di talaga yun atomised, vaporization occurs once the diesel fuel is injected in the cylinder around the terminal stage of the compression stroke where the compressed air is so hot already.
Halos parang buga lang ng syringe w/ G19 needle ang injection pattern, but to test it properly the injectors should be removed and examined individually for injection pattern and degree of injection pressure, yung calibration sa R2 ko is 140 Bars or 2030 PSI (sa tanda ko). Iba ang sistema sa mga CRDI engines.
Yung timing marks you will see it with removed timing belt cover. Yung (+) advance, or (-) retard signs dun located sa may Injection pump. Yung makina ko medyo naka-advance ng konti di ko ma-recall how many degrees, as is lang ito when I change the timing belt.
There is a minor catch in replacing the timing belt which a novice may miss_ be sure to hold the injection (shaft) timing in place until the timing belt is fully tightened or else the injection pump shaft will turn missing about 2 or more timing belt teeth off the mark.
BTW, grabe ba talaga yung puting usok, parang Fog na ba, kasi yung old school diesels eh medyo mausok talaga especially pag nakatutok yung sunlight sa tambutso.
Baka kasi kulang pa sa break-in yung mazda mo napa-general overhaul mo pala talaga yan. How many Km na yung tinakbo after the repair. Masama ba yung hatak at constantly palyado ang takbo.