burning alot of gas on 1992 Nissan Pickup (D21)

wonder how to fix the problems
It burns sooo much gas.

Asked by for the 1992 Nissan Pickup (D21)
Diagnosis is the first place to start. There can be several reasons but without performing some tests, it's impossible to determine what is wrong.
A few things to check:
*fuel pressure
*oxygen sensor operation
*fuel mixture settings (if applicable)
2 answers
im having the same problem