Hoosier CRD wrote:
How many clicks does your Cherokee have?
On a common rail diesel system, white smoke on startup, is an indication of a high rate of fuel return. This points to a failing injector(s). Given that all have the same amount of wear, if they are determined to be bad, I would highly recommend replacing the set rather than one at a time.
If there is a shop you can access that can remove and test your injectors on a test stand, this should tell you the state of their performance.
FWIW
Hoosier CRD
The white smoke only happens when it takes about 10 seconds plus to start not sure how many clicks never counted , dueing the summer no smoke nor once started dueing cold days, and at the moment the temp over here is around 5degC - 10 deg C and it taking around 3-4 cranks but no smoke which i can live with, i had this issue last winter to, i had injectors flow tested then they were all Ok looks like another test, i had new glow plugs fitted to which turned into a complete overall as number 3 glowplug was carboned on to head which snapped as we tryed to get it out, had the latest fuel filter housing, fuel pressure regulator, battery fitted ect £1200+ bill around $1900 ouch i was hoping it was cured but not, as this was doing this before any work was carried out earlier in the year, i would of thought if it was injectors it would of been doing this all through the summer i only said that cause the jeep started first time this morning it was mild overnight 13 deg, yesturday was 8 deg and took 3-4 cranks,