i reset my ecu after every mod , but i have a question maybe soemone knows, or can try this and tell me what they think...


you know when you turn on your car w/o starting it the check engine light stays on???

well today when i was resettign my ecu i noticed ( turn clock wise , stop, counter clockwise, etc) if you turn it too much it the check engine light disappers (when its NORMALLY suppose to be displayed when left in ON position) and when i start my car like that, my idle was really low about ~450-500 when normally its liek 750-800, anyways i drove it like that for a while and didnt really had time to stop but it felt like my car was not pulling as hard and my fuel tank meter which is normally dropping like crazy cause of the way i drive wasnt moing nearly as much.... then when i finally stopped i turned the ecu screw some more and the check engine like came back on again which is normal and i drive ~75 miles and its seems to be pulling a lil more and also using more gas .... wtf???? anyone else experienced this or know what this is about?


mzmtg i heard your giving away long travel rear mounts

 

Somehow you left your car in diagnostic mode, that's why it ran like crap.

Yeah, I'm giving them away for the low low price of $75

 

What the h3ll are you talking about?
So basicly, you theory is their is no need to have the ECU reprogammed. All we need to do is reset it, and drive like crazy to build a more powerfull program?
Im assuming to gain the 7500 rev limiter we should just reset the ECU and always shift at 7500 after that to acheive this as well?

 

I have a '98, 5-speed with 86,000 miles on it.
On the highway, I am getting 27 MPG on a fairly regular basis.
Around the town, it drops to low 20's, maybe 20-22 MPG.

 

I get 23-24 city, 28-29.5 on highway going (80 to 90 mph). I only use 93 octane, although it's getting to be a pain in the a$$ @ $2.15/gal.
I use the STP injector cleaner with full tank every oil change, & rotate, balance tires every other one.

Cheers.

 

ECU:
To those dipliomatic few, after speaking to a max mechanic, it never hurts to reset the ECU, especially if you've done any maintenance on the car. So after cleaning out your TB, changing your oil, running SEAFOAM, it's ALWAYS not a bad idea to reset the ECU (besides, it gets you to check your codes).

 

Yeah, but it's not required.

And there's still no performance reprogramming going on if you drive like a bat out of hell for 2 tanks of gas.

 

do you get better gas mileage drivign in diagnostic mode.

i can trade u 150 e-cool points for a set of mounts , nah but i do want to get a set.... need cream

 

It depends on alot of things.

 

For everyone in cold climates, you are all overlooking a huge reason your getting a decrease in fuel economy. Fuel companies are required to use "oxygenated gasoline" during winter months. These additives are for emissions purposes, but they will zap your fuel economy by about 60-70 miles per tank.

http://www.chevron.com/products/prod...etin/oxy-fuel/

I do alot of highway driving, and I get about 25 mpg during the summer, and now I get about 17. Plus, I always overlook the fact that I let my car warm up for about 10 minutes every morning (6 days a week) . . . this means the car just idles for an hour a week, which also kills fuel ecoomy. So don't think you car is crapping the bed (unless it actually is), it happens to everybody.

 

Wow metal needs to be

 

thats for sure.

i get like 22 around town and 30+ on the highway. Does anybody know if an air intake increases gas milage? i put mine on last tuesday and i already seem to be gettin better milage.

 

Replace the air filter and check/replace the spark plugs.

 

definitely does. You run leaner with better airflow, therefore saving gas.

 

I'm sure you've all heard the caveat about comparing apples to apples?

Well, here we have cases of comparing apples to potatoes or tomatoes.

The only way to have an accurate comparison of two vehicles MPG is for them to drive exactly the same route, at the same speed, on the same day and time, and have the exact, same model and equipment.

ANY deviation from that benchmark will give you varied results.

A 5-speed will get better MPG than an automatic.

A car driving in rush hour traffic twice a day will get lousy mileage as compared to someone who works at home far away from the city and drives on an open highway most of the time.

If you have to do the rush hour thing, and it takes you more than 30 minutes to go 5 miles, then you'd be lucky to get 17MPG.

I have an automatic tranny that is a big gas waster because a lot of times at cruising speed, it will not downshift unless I punch the accelerator. So, what I have been doing in these cases is to manually downshift into 2nd gear.
Lo and behold, I get an instant shift without having to press my gas pedal down...which, in the end translaters into better gas mileage.

I know because I compared my driving in both styles: 1) let the tranny do all the shifting, or 2) manually downshift when I need to pass.

My mileage around town using Method #2 is 18.5 mpg, and 17 mpg using Method #1. I'll probably wear out my gate with all the shifting...or maybe not.

Method #2 also includes turning off the O/D button to get an instant downshift to third when I am in the highway and want to pass someone.

Call it a "poor man's version of a Select-Shifter or Manumatic."

Yes, some days I wish I had a 5-speed, while other days (like when I am stuck in bumper-to-bumper traffic) I am glad that I have a slush-o-matic.

I know that there is a crowd out there who do not like manumatics, which, for the life of me I do not know why because using them is totally voluntary. I would be tickled-pink if my car had one ('cuase then I wouldn't have to be doing this funky shifting I do).

HOWEVER, I do really dislike cars that have paddles on the wheel for shifting (like the Lexus and Audi's do). It feels very, very wierd. These Luxo cars put way too much stuff on the steering wheels anyway.

Sorery...I got distracted.

 

you went this far back in history just to say that, how disappointing. I put another 30k miles on my car since I last saw this thread

 

If you have a heavy foot and warm up your car that decreases the mileage ALOT try again when it gets warmer. I avg. 18 city in my 96 I30 with no codes no problems this winter and I noticed it.

 

For those who missed it the first time I posted it, read this . . . it is a GREAT explanation of decreased gas mileage during the winter. Obviously other factors come into play, but this definitely holds true:

For everyone in cold climates, you are all overlooking a huge reason your getting a decrease in fuel economy. Fuel companies are required to use "oxygenated gasoline" during winter months. These additives are for emissions purposes, but they will zap your fuel economy by about 60-70 miles per tank.

http://www.chevron.com/products/prod...etin/oxy-fuel/

I do alot of highway driving, and I get about 25 mpg during the summer, and now I get about 17. Plus, I always overlook the fact that I let my car warm up for about 10 minutes every morning (6 days a week) . . . this means the car just idles for an hour a week, which also kills fuel ecoomy. So don't think you car is crapping the bed (unless it actually is), it happens to everybody.

 

I just got back from a round trip from Dallas to Galveston and back on ONE tank. 574 miles total. I kept my speed at 70mph except while sitting in morning rush hour in Houston. I have 156k on my 99(5spd).
On another note. I took my 96(auto) down there a couple years ago and even drove around a bit...661 on that tank. This is not BS. I had a couple guys follow me and while they had to stop for gas, I was able to keep going.

 

I consistently get between 360 to 380 miles per tank in combined city/highway driving. And keeping up with traffic on the Beltline means rolling at 70 plus MPH. For a car that weighs as much as ours does, AND is geared the way it is (3000 at 72mph), I ain't complaining. AND the plugs are over two years old.

 

Wow. I'm starting to feel a TON better about my 16-17 mpg (in winter). It's mostly highway, but I'd say up to a third of it is suburban/city roads.

My 5-speed gets driven hard every damn day... bar none. I treat it like it's about to fall apart until it warms up, but the instant she's running right and traffic gives me some good breathing room, bam... right foot goes right to the floor. WOT is common when I have the space around me, and I end up seeing redline at least once a day on average.

I have some weight savings from my coilovers (~22 lbs), wheels/tires (~20 lbs), and CF hood (~18 lbs)... but I also have climate control, power driver's seat, ABS, a fairly big sub, and a 3/4" MDF sheet that I put down in the trunk to support the sub, so overall the car is probably slightly heavier than stock...

I use nothing but Amsoil lubricants: 75w90 gear oil for the transmission, and I had been using 10w30 for the engine; I just switched to 5w30, so let's see what that does. I also have a K&N filter and iridium plugs, and I NEVER use anything but 93 or 94 octane gas. Tires are wider and slightly smaller than stock (225/50/16), but I have them up around 44 psi cold.

Car is otherwise bone freakin' stock, with 124k miles.

 

i get about 16-18 mpg in the city....and about 22 when i drive mostly on the highway.....my gas mileage sucks and i have no idea.....

 

I love it when people claim to get better mileage than the specs from Nissan 5 speed 22 city 27 highway auto 21 city 28 highway. These are conservative estimates that they came up with when testing brand new cars.

 

This is more of a Question for this kind of web site.http://www.fueleconomy.gov/

 

http://forums.maxima.org/showthread.php?t=342698

 

I bought 96 maxima se auto on sep 2005 with 148,000 miles on it.
I drive 60 miles a day and I get about 22-23 mpg on 60/40- highway/city driving. I think it's a good mpg since I drive hard. I think that maxima's gas don't hurt your pocket- maybe 5-12 $ a week or 250-600 a year more than civic or corolla. For this kind of driving enjoyment and performance, it's the good car I ever had.

 

I probably get around 19 in the city and 22 on the highway on a good day.

 

What does MPG mean ?

 

I get about 17-18 mpg usually all city and I usually drive fast. I use a/c a lot switch o/d off a lot and go wot a lot. I also always run 93 octane. Oh yeah I have a 96 se with 128k miles on it. And there isnt really a set amout of mpg you should get, it just depends on your driving style. Obviously if you go wot a lot your mpg will be less than someone who keeps it under 3k rpms. If you want better mpg just drive slower.

 

The readout on my 03 read 81.3mpg on my way home from work today ..FTW:

 

The fuel economy you get largely depends on how hard you accelerate.

In the city, with hard acceleration, expect 15-20mpg.

On the high, with hard accelration, and high top speeds, expect 20-25mpg.

Throw on air conditioning, low tires, dirty air filters, old oil, subtract another 5mpg.

Use 89 octane, take off another 2-3mpg.

Use easy accleration, moderate/no air conditioning, staying within speed limits, expect 23-25mpg city, 32-35 mpg highway.

If you have climate control, use economy, not auto. That'll save you around 20% of fuel burn in the summer.

Other factors: what year is your max (95/95 lighter than 97-99)? Accessories? Power/heated seats? Climate control? Heated mirros? All add up to fuel consumption, but not much.

I've gotten as low as 17mph, and as high as 34mpg in my maxima. It's all how you drive with your foot when you accelerate. That can impact your fuel economy by 30%.

Cheers!

 

Doesnt turning overdrive off lower your mpg too??

 

I get around 22-25mpg highway which accounts for 90% of my driving.

 

wow i get nearly 20-23 MPG and i never go over 2k RPMs. i think i may need to fix somethings but other than that i think if your getting less than 20 MPG that may just be that you need to replace parts on your car. man i kinda wish either gas was cheaper or maxima's got an estimated 30/33 city/hwy MPG. but seeing as how chepa gas is getting its not that bad anymore. right now my trip is at 215 and its at halfway. gl with your MPG D:


btw i don't really drive on the HWY that much. HOV FTW.

 

NO do not turn it off. your wasting more gas.

 

Same post, different wording.

 

96 auto, 218K. Still get 24mpg avg combined driving. I don't drive crazy, but I don't baby it either. I get 20-21 mpg pulling a bass boat. On a long highway trip I have gotten 30-31, 515 miles on a tank was my best.

jjam