On a 19 year old vehicle I would suspect you have a vacuum hose that is leaking. Replace all under hood vacuum hoses.
The cabin filter was introduced to Nissan Frontier's in 2002.
filter on Nissan fronterAnswerOn the 2wd frontier if you slide under the truck from the front(after removing plastic under guard) it is located on the right front part of the motor. It is small and can be a little difficult to see.
Filter locationBelow the Passenger side door, along side of the Truck's Frame. Silver colored cylinder with a hose attached at each end.
4 1/8 quarts for 4x4 model with oil filter.
Including filter; the oil capacity for a 2WD, 2000, Nissan, Frontier, 4cyl (Ka24de) is 3-3/4 quarts. Straight out of the Haynes manual.The 4WD model, also including filter requires 4-1/8 quarts.
where is the fuel filter located on a 2002 Nissan frontier truck 4 cycle
It's in the fuel tank
with new filter 3 3/4 quarts for the 2wd and 4 1/8 quarts for the 4wd
It's in the fuel tank
the filter is on the frame rail and there is a special tool to release it
Both engines require SAE 10W30 oil. The 4 cylinder holds 5 1/5 quart with filter change. The V6 holds 5 2/5 quart with filter change.
It is 3 3/4 quarts of oil. It is a little more if you change the filter. It is recommended you have the oil changed every 15,000 miles or so.