All 1990 Infiniti M30 questions

The fuel filter is it located in the engine area or on the frame under the car.

In the process of changing a bad alternator, a ground wire was disconnected and came in contact w...

where are the 3 spark plugs located on the driver side of the engine, i can only find 2 of them.

it will run but its got like a skip to it and white smoke coming out exhaust i put new starter o...