[gazza]

hi,jeep idles rough,struggles to accelorate over 40,blows out white and blueish smoke can anyone help.

 

[Frango100]

Welcome to the garage.
Is it loosing coolant? Could be a headgasket. Do a compression and leak down check to find this out.

 

[hoffmanestates]

4.7 or 4.0

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[gazza]

its a 2.7 crd limited diesel.

 

[bessniak]

give a check at your egr valve im not sure where is located at diesels but many diesels problem is egr valve remove and clean it see what happens then