Gas mileage!!!!!

[shepherd79]

err this is how i check mpg on a car.
1. Fill the tank note your milage on the odometer or reset your trip guage.
2. Drive the car,when the tank is fairly low fill again until the pump just stops on its own.
3. Take the gallons you put in the car and divide that by the miles you drove that your MPG
So yesteday I filled up my old 77 lebarron i put 13.2 gallons in it and I drove 165 miles.
The answer is >????????????
wp

i do exactly the same thing to figure out the gas mileage.
My car is getting 37-40 mpg on highway or around 32-35 in the city. the reason i am getting this kind gas mileage is because i have 5 speed from carbed accord. It has lower gear ratios.

[2oodoor]

well whats your formula old mighty one?
its stock 318 4 barrel lean burn. it gets 2-4 mpg better with acetone.
My point being you dont need to know the size of your gas tank to figure your milage just fuel amount used and miles driven. Maybe that a better way to say it and lord knows I should NOT teach math.
wp

Old mighty one?, omg, i have become my monkeys uncle. Im just trying to help with ideas man and what I have seen work before. Gas mileage formula I assume you are meaning, backwards from yours, how many miles Y did you get from the amount you put in Z, so Z divided by Y + mpg . example for the class clown in the back rolling a doob, Z/10gal divided by Y 100 miles equals 10 mpg.
OH regarding the chrysler, whatever you do its yours but acetone will eat up shit.. All those I converted were lean burn, that is why I replaced distributor with points], moved the wire on the ballast that goes to coil. adjust carb to its bottom stop, then adjust mix, and set timing so it just stops pinging, about 10-12 deg BTDC, you also have to punch out honeycomb in cat. I promise if the 318 is in good shape valve sealing good and timing chain good, you will get 20 mpg , Ive done it to several cars, it makes a lot more power to

[snoopyloopy]

something is foul in denmark, dude you suppose to get better gas mileage with headers... as long as you dont keep digging on the sound of those fat tubes!!!!!,also you may have funkywompassed your O2 zsensors, bad or slow reading ones can kill your gas mileage and you willnever be able to tell by the way it runs.

i know, which is why i was a bit confused. when i loosened the egr valve so i can get it on, i didn't tighten one of the bolts enough so it fell off and i haven't gotten another one. and i reversed the o2 sensors because the guy i bought them from said that the engine runs better that way. (and i put them on properly and the car did run like complete crap. but he bought the headers used himself so maybe it's just time for new ones.) but beyond that, i don't see what could be causing it because that's all i bothered. but maybe it is the o2 sensors because my engine acts like i added vtec headers. no power/acceleration to 2500 then power to 3000 and then none till 3500 when it's cold. and when it's warm, no power till 3300 or so. then it's like vtec kicking in. sounds cool but it's annoying as hell since i don't really like cruising in 3rd gear on the freeway.

err this is how i check mpg on a car.
1. Fill the tank note your milage on the odometer or reset your trip guage.
2. Drive the car,when the tank is fairly low fill again until the pump just stops on its own.
3. Take the gallons you put in the car and divide that by the miles you drove that your MPG
So yesteday I filled up my old 77 lebarron i put 13.2 gallons in it and I drove 165 miles.
The answer is >????????????
wp

to figure out your mpg, you divide how many miles you went by how many gallons you went. not the other way around. the acronym, miles per gallon, tells you that you divide the miles by how many gallons, not the other way around.

[B16KILLA]

i know, which is why i was a bit confused. when i loosened the egr valve so i can get it on, i didn't tighten one of the bolts enough so it fell off and i haven't gotten another one. and i reversed the o2 sensors because the guy i bought them from said that the engine runs better that way. (and i put them on properly and the car did run like complete crap. but he bought the headers used himself so maybe it's just time for new ones.) but beyond that, i don't see what could be causing it because that's all i bothered. but maybe it is the o2 sensors because my engine acts like i added vtec headers. no power/acceleration to 2500 then power to 3000 and then none till 3500 when it's cold. and when it's warm, no power till 3300 or so. then it's like vtec kicking in. sounds cool but it's annoying as hell since i don't really like cruising in 3rd gear on the freeway.
.

my car was doing the exact same thing when I put on my header. Leave the O2 sensors in and just switch the plugs. Plug one O2 sensor where the other goes & vise-versa.

[MessyHonda]

^^^you guys have DC or pacesetters?^^^

[B16KILLA]

^^^you guys have DC or pacesetters?^^^

I have the pacesetter. I'm not sure about snoopy he might have a dc

[RamThis]

Make sure when checking mileage, you use the SAME PUMP that you got your gas from before. Fill the tank until the pump shuts off automatically. Reset your trip odometer. Drive it till you need to fill up, go to the SAME PUMP (because it's going to meter the fuel the same, plus the car will be setting in the exact same angle as before so air pockets wont be an issue, meaning the pump will put the exact same amount or at least very close, enough to determine mileage to a fairly accurate degree)

Once you know how much fuel it took to refill, divide your miles driven by the gallons of gas you put in, and that is your average fuel mileage for that tank. You need to do this over at least five tanks, ten or more is better, then you can add each averaged mileage per tank together, and divide that number by how many tank full's averages you added together, and that will give you a good, clear overall average of your mileage over a long period of time. Mileage can vary alot, depending on ambient temperature, traffic conditions, and actual fuel composition between tank to tank.

It's not hard to do either, just keep a piece of paper in the door pocket and a pen, and just write down miles/gallons each fillup for a while then do the math later.

Also, the headers might make the mileage seem to go down, only because of the "novelty" of the added power makes you drive it harder whether you know it or not. My truck's mileage dropped alot going to 4.10 gears at first, but once I got used to it and wasnt driving the piss out of it all the time, my mileage actually came up 1-2 MPG average from when I had 3.55's.

[TWOLOUDNPROUD]

^^^you guys have DC or pacesetters?^^^

Messy PM me with your Address for i can sent you the Dc Header.

[2oodoor]

i know, which is why i was a bit confused. when i loosened the egr valve so i can get it on, i didn't tighten one of the bolts enough so it fell off and i haven't gotten another one. and i reversed the o2 sensors because the guy i bought them from said that the engine runs better that way. (and i put them on properly and the car did run like complete crap. but he bought the headers used himself so maybe it's just time for new ones.) but beyond that, i don't see what could be causing it because that's all i bothered. but maybe it is the o2 sensors because my engine acts like i added vtec headers. no power/acceleration to 2500 then power to 3000 and then none till 3500 when it's cold. and when it's warm, no power till 3300 or so. then it's like vtec kicking in. sounds cool but it's annoying as hell since i don't really like cruising in 3rd gear on the freeway.
to figure out your mpg, you divide how many miles you went by how many gallons you went. not the other way around. the acronym, miles per gallon, tells you that you divide the miles by how many gallons, not the other way around.

I was cornfused too, I looked back and it looked like the same formula to me, but his final answer was way off from mine. go figure./.. hahah I said figure
Are these Hondas like other OBD2 cars where you must unhook computer so it can relearn the changes. Reversing the wires on the sensor themselves just is for fooling the ECM if you have removed cats. with headers you can also up tune your timing a couple of degrees from spec... and give your injectors a more steep dwell curve. if you use programable type. also you may need a valve job, valves may not be seating good nuff, so losing back pressure actually hurt your bottom torque, does any of that make sense>? Im putting on my DC tommorrow and I sure dont want that investement to cost me mpg, but Im carbed .wood not hurt, would not indeed to check out the rest of exhaust system. and make sure egr is not stuck open.
take care snoopy, and try not to change too many things at once before test drive, it gets you all P'd off.

[RamThis]

OBDII cars do not need the battery unhooked anyway, it is a total myth. They are adaptive and will adjust themselves to obtain the highest efficiency constantly.

[snoopyloopy]

my car was doing the exact same thing when I put on my header. Leave the O2 sensors in and just switch the plugs. Plug one O2 sensor where the other goes & vise-versa.

yeah, that's what i ended up doing. green into yellow and yellow into green. because correctly, it ran like complete crap. but the "vtec" phenom is stil annoying.

^^^you guys have DC or pacesetters?^^^

i do.

and i think it may have a bit to do with what type of driving i'm doing. when i took longer trips on the highway with the stock headers, i was getting the same 23 or 24 mpg i'm getting in the city. now i apparently get around 20, 21 in the city, but 30 or so on the highway. so apparently i need to do more road trips.

[TWOLOUDNPROUD]

This is going to kill you with my B20a and my fuel presure set at 60 psi stage 2 cams and my Shogun Hypertech turner i Still get 275 miles to a tank.

[HOOPTIE]

Make sure when checking mileage, you use the SAME PUMP that you got your gas from before. Fill the tank until the pump shuts off automatically. Reset your trip odometer. Drive it till you need to fill up, go to the SAME PUMP (because it's going to meter the fuel the same, plus the car will be setting in the exact same angle as before so air pockets wont be an issue, meaning the pump will put the exact same amount or at least very close, enough to determine mileage to a fairly accurate degree)
Once you know how much fuel it took to refill, divide your miles driven by the gallons of gas you put in, and that is your average fuel mileage for that tank. You need to do this over at least five tanks, ten or more is better, then you can add each averaged mileage per tank together, and divide that number by how many tank full's averages you added together, and that will give you a good, clear overall average of your mileage over a long period of time. Mileage can vary alot, depending on ambient temperature, traffic conditions, and actual fuel composition between tank to tank.
It's not hard to do either, just keep a piece of paper in the door pocket and a pen, and just write down miles/gallons each fillup for a while then do the math later.
Also, the headers might make the mileage seem to go down, only because of the "novelty" of the added power makes you drive it harder whether you know it or not. My truck's mileage dropped alot going to 4.10 gears at first, but once I got used to it and wasnt driving the piss out of it all the time, my mileage actually came up 1-2 MPG average from when I had 3.55's.

This is how I did it and I average 34 mpg (75% highway and 25% city). I do not drive it easy either and I have almost 300,000 miles on it too. It is maintained like a new car and it does not leak, drip, or use any oil. Maybe I have a freak car but I LOVE IT!!!!!!!!!!!!!