It could very well be a carbon build up on the valves. I would try some engine cleaner and injector cleaner first though.
Change the fuel filter.
where is the fuel filter located would like to see a picture , 1990 Nissan Sentra sedan
98 Nissan sentra only came with ga16de and sr20de, any ve motor would be considered a swap seeing that its a motor made strictly only in japan
depends on where the oil leak is at
No, but it can be replaced. I would recommend taking to a professional.
AnswerNoises have to be heard to correctly diagnoise. TAke it to a garage. But a good place to look for a noise when the driveline is under torque ( accel and turning) would be the CV axles.
It would depend on your level of competence.
I wish someone would answer this question. I need the answer too!
maybe check the thermostat.
Leak or blown gasket.
Dirty fuel injectors or spark plugs
Its on the passenger side behind the engine you have to reach up to get it. Its a bigger filter than you would expect for a nissan.