Tgang94

Once again ineed help . It seems im not gettin the gas mileage ishould be getting . What should ido or buy to raise my gas mileage?

shipo

How long since your car has been tuned up? Have the Oxygen sensors been replaced? Are your tires pumped up to at least the recommended pressure for your car?

Tgang94

I just bought it so ihavent done nothing to it . I just recently filled tires with air

shipo

Your best bet then would be a tune up and see where that gets you.

Tgang94

Where do you take it to tune it up

TheMuffinMan

iTrader: (1)

He means doing things like fluid change, spark plugs/wires, air filters, etc. Any mechanic shop can do that.

shipo

Seriously?

GhostAccord

I agree a basic tune up would be the first step. However, I'm just wondering what you are getting for MPG and how did you calculate it?

Gamez

Basic tune up would be the first step, If you do it by yourself when you replace the spark plugs be careful of the spark plug gap, it is very important, change the oil, air and fuel filters, spark plug wires

Tgang94

Thank you

Tgang94

How can you tell that the spark plugs need to be changed ?

TheMuffinMan

iTrader: (1)

If you don't know when they were last done, then you should probably change them....

You're asking how to improve MPG and that's one of the easy things to do.

Make sure you're calculating it right too...

Tgang94

Thanks , and how you calculate ? Just makin sure iam doin it right

shipo

1. Fill your gas tank until the pump clicks off
2. Drive the car until the tank is nearly empty
3. Refill the tank and record the number of gallons/liters
4. Repeat one or more times

Immediately after a fill-up:

1. Add the total number of miles driven since the first fill-up
2. Add the total number of gallons/liters added starting with the second fill-up
3. Divide the total number of miles by the total number of gallons/liters added

eirigance

I'm getting 230miles to a tank? Code is showing bad O2 sensor, but it is new & has been checked? It is fully functioning. Any ideas as to why it would continue to not work in my car, but work fine in another & test as good? Computer maybe?


Posted from Honda-tech.com App for Android

GhostAccord

Wiring or ECU (computer).

Check for a short/open in the O2 wires between it and the ECU and ground.

eirigance

thx "GhostAccord" I've been hearing that alot. :'(


Posted from Honda-tech.com App for Android

GhostAccord

PM sent!

eirigance

Ok. So I have replaced my Plugs, Wires, O2 sensor (again), my ECU & my wiring harness. Changed my fuel filter & have no oil leaks of any kind. Spent about $700 just in parts. My cel is finally off... but I'm still only getting 250miles to a tank of gas?!?! my friends Accord is getting like 375 on avg. WTF?!?!?!?!? & his runs like ***. Mine runs perfect. I don't get it. I've even broke down and took it to the dealer & they couldn't find anything wrong.

TheMuffinMan

iTrader: (1)

250 miles to the tank is NOT how you should be calculating MPG. It doesn't stand Miles Per Gallon so you can use Miles Per Tank.

Follow the procedure to get an actual idea of what your mileage is. Your car's bobber in the gas tank may be bent and you're actually getting 40MPG with an inaccurate gauge.

No idea why you replaced the ECU and wiring harness - seems like a waste of money to me. The plugs should be <$20 for the four of them and the wires not much more than that either. O2 sensor *might* be $100 but definitely nothing crazy.

You also don't say if you have stock wheels or 20" chrome spinners or what tires you're using. Low rolling resistance tires and lighter wheels are ideally what you want.

eirigance

wow. thx. for no help? I wasn't saying it was mpg. I said I was getting about 250miles to a tank of gas. I had to replace the ecu & wiring because they were bad, or else why do it ?!? I'm not sure why you even commented on this thread ? you're just wasting my time to write this back to you. the wheels are stock 15" & I have ran the car completely out of gas at 253miles, so the bobber as you put it is not bent. Maybe had you read the whole thread you'd have seen I been through that, but really thx man.


Posted from Honda-tech.com App for Android

TheMuffinMan

iTrader: (1)

You're still not grasping what I'm saying.

You cannot, in any way shape or form, calculate your MPG based on how many miles you think you're getting from full to empty on a tank of gas. It's physically, mathematically, logically impossible.

You also do not mention any of the other items I pointed out (wheels, tires, etc) in any of your posts in this hijacked (2-month bumped) thread.

*edit* And as a head's up, the amount of miles you can go per the gallons of gas in the tank you used = MPG.

MAD_MIKE

What TheMuffinMan was laying down for you to pickup is that using your tripmeter and fuelgauge as a way of figuring out mileage is incorrect.
The fuel gauge can be quite fickle on any car, it's just not an accurate measuring device.

Ideally, you would want to fill up at your normal gas station, even better the same pump. Fill up the tank til it clicks, reset trip meter and drive. When it is time to refill go back to the same station/pump and refill til the pump clicks. Note the amount of fuel pumped, and the mileage on the trip meter. Divide mileage by gallons and you get your average of MPG for that tank. Do this again three more times to get an idea of what kind of mileage you are attaining.

Posted from my couch using the keyboard.

GhostAccord

So if he is getting 250 miles (per tank) and you divide that by 13-15us gal (average fill up from empty with a 17.1 gal tank with 3-3.5gal remaining in tank) = 19-16.5MPG.

Why is there a need to figure what the MPG is? You can tell that he is getting bad fuel economy when he says that he is averaging 250/tank. Our Accords all have the same size fuel tanks and regularly take the same amount to fill from empty.

Tomato, Tamato - Potato, Patato!

MAD_MIKE

That leaves a bit of a variable. Unknown is the actual amount of fuel consumed, and the actual amount of fuel in the tank.

Not all gas stations or pumps will click off at the same point. There was a station I went to and for whatever reason I found myself bouncing around to the various pumps. I was only doing the 'per tank' tango and found some days I would have incredibly awesome mileage and other days absolutely horrid. I stuck with just using one pump at a particular station and the 'per tank' math worked out to what was expected. I began to use my brain and did some math and the numbers from then on were consistent.
There were at times, depending on what combination and order of pumps I used, seemed to be either 2-3 gallons of gas 'added' or 'missing'.

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Bad science is bad science, eliminate the assumptions. Accurate data is hard to fault.