Poor Gas Mileage
#1
Guest
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Poor Gas Mileage
Hey i got a 1999 nissan maxima SE limited. I get very poor gas mileage sometime i do drive it hard but even on times i dont my gas mileage is still poor.
-new filter
-recent oil change-
-tb CLEANED
ANY OTHER IDEAS ??as for the KS my performance isint being affected as they say under 3 k rpms pulls pretty hard till 3 k
-new filter
-recent oil change-
-tb CLEANED
ANY OTHER IDEAS ??as for the KS my performance isint being affected as they say under 3 k rpms pulls pretty hard till 3 k
#11
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Posts: n/a
I have a 95 with 165k and I was getting 15mpg (bad considering I can get that on my94 Bronco with a 5.8 motor and 35" tires) Found a bad knock sensor and jumped it out with a 470k resister and that got me 20mpg(highway). Last night I replaced my 2 front O2 sensors and it made a big difference. Don't know the milage yet but I drove about 100 miles today and the guage barley moved. I was getting codes for fuel trim and never got a code for the O2 sensor. When I pulled them out they where plugged. If you have high miles try changing them it can't hurt.
#15
I checked last week and got 20mpg. I'd say I never went more than 30% throttle even once the whole time I was testing the gas mileage. I have changed the following in the past:
sparg plugs (7k miles ago)
knock sensor (30k miles ago)
fuel filter (5k miles ago)
rear o2 sensor (3k miles ago)
I've never changed the pcv valve or the front 2 o2 sensors. Is changing the pcv valve part of a 60k tune up?
I also have a cel for evap solenoid. What can that do?
-Paul
---------------
96 SE 5speed i/y
2.28
14.762
93.8
sparg plugs (7k miles ago)
knock sensor (30k miles ago)
fuel filter (5k miles ago)
rear o2 sensor (3k miles ago)
I've never changed the pcv valve or the front 2 o2 sensors. Is changing the pcv valve part of a 60k tune up?
I also have a cel for evap solenoid. What can that do?
-Paul
---------------
96 SE 5speed i/y
2.28
14.762
93.8
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