greetings! a noob here, so please pardon my ignorance.
we have a diesel nissan power pickup circa 1992. it has a whole lot of miles on it. recently a triad of problems popped up:
1. the engine oil leaks thru the hole where you put the dipstick
2. the smoke emitted by the exhaust suddenly worsened (we just had the engine calibrated to lessen said smoke)
3. when i step on the accelerator pedal, i feel that there is no power being transmitted by the engine to the wheels. this problem disappears when i run the engine for a relatively long period of time.
what do i do?