i get really low gas mileage and i really dont know why. i changed to spark plugs, o2 senor. i mean it is supossed to get like 35 or so it has 150000 miles on in wat could b something that is wrong with is like wat else could i check? one of my friends said to check the compresion and the ecu but i dont know i really dont have the money to do anthign so i want woundering wat i should do?
When a grisly killing spree in Vancouver left 15 women dead, PETA tried to purchase full-page ads in local papers suggesting that this carnage was no worse than the killing of animals for food.
If it is cold out, my mileage drops since the car is not fully warm for extended periods. But your mileage is too low. A bad thermostat will not allow the engine to warm up. Maybe check that. Ok, you changed the O2 sensor. Hopefully you used NGK plugs. How is your cap and rotor? Timing could be way off. I know that will reduce gas mileage (from personal experience)! Do you have a friend with a timing light that could help you check it? If it just started getting horrible gas mileage when it became cold out, I would check the thermostat first. Inexpensive part, little hard to get to on this car. Lew posted most of these.
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wat is the b14 FSM and ok that is all that could b done?
So, you have a b13. Regarding the throttle wire hanging, you may want to clean the throttle body. The carbon build up can cause things to hang up. All you need for that is a can of throttle body cleaner and an old tooth brush.
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since i dont know wat u are talkin about to clean i will get one of my friends to help unless u can tell me wat your are talkin about. i am not stupid about cars it is my first car only had it for....4 weeks but i did work on it b4. never really liked workin on the engine.......thx for all the help
You know, I am in the same situation with many things regarding cars. I am also learning. I will give more details when I have time. Have to go to a doctor right now. Also, using the search feature here can be a real education. Or, doing a general search on the internet. It may be a good idea to get a Haynes manual when you have money. It can help you understand a little more about your car, and some basic repairs.
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Truth alone triumphs, not untruth. :)
Blonde, just a few thoughts or ideas. Remove the air intake tube
in between the upper intake and MAF sensor. Look inside this tube
as well as the throttle body itself for any excessive oil residue, which
if discovered, may be a sign of worn piston rings. Also, pull the spark
plugs and have a look at them. See if they are black and sooty
(exsessive fuel) or oily (worn rings / valve components). There should
be some kind of sign as to what's what, especially when getting 16-19
mpg's on a 4 banger. One other thing, the smell of either raw fuel, sulfur
(rotten eggs) or burnt oil out the tail at idle and/or at steady rpms, may
also give you a hint as to what's what.
__________________ 1997 Sentra GXE 4 DR - 1.6, Auto: 3" K & N Cone filter, Home fabricated CAI, timing 15*, Mobile 1 synthetics, Front & rear strut bars, Front & rear euro lights, clear corners, rear spoiler, HD driving lights, Sun Pro tach. "When my time on earth comes to an end...I want to go peacefully like my grandfather....
Not like the other people screaming in the back seat of his car." :thumbup:
since i dont know wat u are talkin about to clean i will get one of my friends to help unless u can tell me wat your are talkin about.
Cleaning the throttle body may not be the reason for your poor gas mileage. Now, if the throttle is hanging up, then cleaning it will help. I cleaned mine this summer. Made an overall improvement in performance, but did not notice much change in gas mileage. So, if your throttle is not sticking, and your car idle is normal, then it may be good to check the thermostat to make sure it is not stuck open first. This morning it took 15 minutes or so to get the temperature gauge into a normal area when it was in the 30's outside. In my car the normal range is about 1/4 above the cold mark. But, once it is hot, it stays there. If your thermostat is stuck open, the antifreeze is constantly being cooled off when it runs through the radiator. The engine never gets very warm, and runs very rich. If it is stuck opened, your temperature gauge will not get in the normal range. Also, you may notice reduced heat. So, check your temperature gauge. I will attach a picture of what mine looks like when the engine is warm. Unfortunately, if it needs to be replaced, it is not easy to get to. My air conditioning no longer works, so I removed the AC hose to get better access. Also, it is a little complicated to get the air out of the cooling system when you drain and refill antifreeze. You may want to have someone replace it if it is bad. Here is some information that may help understand this problem:
Not knowing the maintenance history, it may be good to check things to see if they are in good shape or if there are signs of engine problems like BRSGXE talked about. If you have not done so, it may be good to check the air filter and replace it if it is dirty. Only 4 clips need to be undone, and is easy to do. Also, you replaced the plugs. What did they look like? I found using NGK plugs work well. I had problems with Bosch plugs fouling out. Did you use the NGK stock plugs? I had problems with my PCV valve last year. The hose cracked and leaked. It would be a good idea to check your PCV and the hose that attaches to it. The PCV is a metal and screwed into the back side of the valve cover. I am also going to upload a picture of the throttle body. It only needs some clamps loosened to remove the air intake tube to access it for cleaning. Your car is getting old, so you may not get the EPA rated mileage. I am getting in the upper 20's around town, and lower 30's highway. However, now that it is cold getting lower 20's sometimes. It may be good to do a full tune-up, (when you get some money), if you don't know when it was done last.
Full tune-up:
-plugs (done)
-air filter
-PCV valve
-Cap and Rotor
-Fuel filter
-clean throttle body
-Check timing
-Check plug wires
I do plugs, PCV, Fuel Filter, and cap and rotor, and clean the throttle body every 30,000 miles. My timing was check once at the dealership and was OK. It may be good to check yours to make sure it OK. I have replaced plug wires two times. That is also something to consider if the are the original ones. From other posts, most recommend using OEM Nissan tune-up parts. I have gotten most of my parts from Advance Auto, and have not had a problem, but who knows how much better things would run?
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ok to BRSGXE i asked my brother wat he thought it smelled like and he said gas and that is wat i thought it smelled like and also when the rmps get high is shoots out water but my friend said that was normal since i have not driven it in a long time. but since i am at skool i can not check all that stuff but i will check it when i get home and tell you tonite wat is on it or watever i bought the car from a friend so he would know wat he did to it or not so iw ill ask him tonite too thank you so much for all ur help
but i do know that it as a new air filter in it and i clean and took on the hose u guys are talkin about that the black one was i supossed to clean teh inside of the throttle body and also wat do u mean by the throttle body "hangin up" again thx for the help
Last edited by blonde_sk8erboi : Nov 30th, 2004 at 01:00 PM.
ok i ran my car and it read normal temp in 10-13 mins from cold and it seems to be workin really well. so i guess that means that is runing normal. does that mean, that piece mite still b bad or is it good. well i know for a fact cause i put the spark plugs in there my self and they are bosch and me and my friend did not know they was not the best thing to put in there i will check them tomorrow when i get home from skool to c wat they look like. and i am pretty sure the thruttle body was never cleaned so i am sure that would help out a little but write back that is all i have now and thank u
ok i ran my car and it read normal temp in 10-13 mins from cold and it seems to be workin really well. so i guess that means that is runing normal. does that mean, that piece mite still b bad or is it good. well i know for a fact cause i put the spark plugs in there my self and they are bosch and me and my friend did not know they was not the best thing to put in there i will check them tomorrow when i get home from skool to c wat they look like. and i am pretty sure the thruttle body was never cleaned so i am sure that would help out a little but write back that is all i have now and thank u
Hmmm...when you installed the plugs...did you adjust the gap
to factory specs? Many times people not realizing this has to
be done, install them straight out of the box.
__________________ 1997 Sentra GXE 4 DR - 1.6, Auto: 3" K & N Cone filter, Home fabricated CAI, timing 15*, Mobile 1 synthetics, Front & rear strut bars, Front & rear euro lights, clear corners, rear spoiler, HD driving lights, Sun Pro tach. "When my time on earth comes to an end...I want to go peacefully like my grandfather....
Not like the other people screaming in the back seat of his car." :thumbup:
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