2006 Isuzu i350 Pickup Questions

All 2006 Isuzu i350 Pickup Questions

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My truck puffs out a cloud of blue/gray smoke at start up occasionaly. Leaking valves seems to be a common ailment with the i350/canyon/colorado trucks. doesn't happen all of the time so I'm not too worried yet but wo...
I notice when I have driven my truck and park in the afternoon for about an hour or so, on my next start up a brief thick cloud of smoke comes out. Smells like burned oil. This does not happen in the morning when its ...
I am only getting the highest speed which is 4. 1, 2, and 3 do not work.