Jessaaaaay

Just wondering what tune ups, fluid changes, cleaning of things, changing of something, whatever work could be done to increase mpg?(:

jdowen2

Bump up tire pressure 3 psi

TheMuffinMan

iTrader: (1)

Regular maintenance - air filter, spark plugs, wires, tire pressure, tires, alignment, etc

Jessaaaaay

Okay okay, snout things like cleaning egr valve, I heard that increases mpg? If I don't have a cel for o2 sensors which means my o2 sensors are fine, would it make a difference if I just renew them anyways?

holmesnmanny

The oxygen sensor doesn't normally throw a code unless it's completely unplugged or is making your car jerk really bad. If you haven't replaced it for 60k or more, just replace it. You can get Densos from rockauto. Don't buy Bosch.

MAD_MIKE

Like anything else if the EGR system is not fully functional it will affect mileage negatively. So making sure that the ports are free and clear and that the EGR valve itself is clear and able to fully open will maintain MPG.
O2s can be right bastards. Over time they become lazy, the flag switching becomes slowed. Rather than 'rich-lean-rich-lean' the sensor will have a delay, '...rich....... lean............rich.......lean....' This will not set a code.
Stick with Denso, Delco/Delphi, or NTK brand O2s. Bosch O2s are inherently lazy. And avoid any O2s that look like beer cans...


Top is typical Bosch 'beer can' style. Avoid these unit types.
Bottom is Denso, Delco, NTK type.

Treat O2s like the nth spark plug. If the plugs are in need of replacement the O2 is probably well worn as well.

Check suspension bushings, balljoints and wheel bearings. An alignment may show within spec, but alignments are done statically. Watch your tires for tell tale signs of worn components. Excessive toe or camber will cause unwanted tire wear and thrust loads which will cause mechanical drag. Verify the brakes are not dragging either.

Remove unneeded weight from the vehicle; books, boxes, clothes, sporting goods, that awesome 30 day survival kit, subs and amps, etc.

Removal of anything that causes wind drag on the car. Otterzone fender escutcheons, mini flags/pennants, that awesome spoiler/wing/bookshelf that was added for the 'mad tight down force'. Those Yosemite Sam mud flaps, etc.

Reduction of weight. Replace components on your car with lighter components, or complete removal. Still have that non functional Honda CD changer in the trunk, toss it. Do you have a spare but also have AAA and never plan on changing a tire, toss the spare tire, jack and wrench.
Replace those heavy 18"~30lb wheels with lighter 15"~15lb units. Enkei RPF1s are probably the lightest, but can be costly. Check Tire Rack for cheaper and nearly as light alternatives.

Make sure all body panels are correctly attached, make sure your original undertray is intact.

Aero mods. Add an airdam/splitter to help move air around the front of the car. Add a belly pan to smooth out airflow under the car. Look up Tuft testing to see if there are areas on your car that can be improved on for air. The econo/Hyper miler crowd often place fender skirts to the rear wheel openings to aide in air flow. Partially blocking the front grille opening helps reduce drag but will also reduce cooling in traffic. Check Ecomodder out for more ideas.

Driving technique is where you can gain the most improvement. Learn how to drive smoother, less brake and throttle inputs/changes will increase MPG. Reduction of speed, no need to do 55, but a svelt 63 will save over doing 72. Find a less traveled road that allows you to attain a constant speed. Before your commute check googlemaps/mapquest for traffic congestion. Don't sit in your car for 10mins idling away because you need to listen to the last two tracks of the latest album.

And the most important, make sure you are buying quality fuel. That quikie mart gas station may be $0.30 cheaper, but it also may be 20% water as well.

kulo

Will disable 02 in chipped ecu help?

MAD_MIKE

No. Disabling the O2 will not allow the ECU to compensate for changes in the fuel mixture from normal driving loads.

Some tuners disable the O2 to prevent any changes to the fuel tables, this may work for certain applications, but to maintain a correct active A/F mixture an active O2 would be best in a daily driver. The more inputs with better resolution will result in better output of power and economy.

Jessaaaaay

Thanks Mad Mike and Holmes, yea I bought my car 5 months ago and it has this o2 sensor that looks pretty beat up, and actually it's a beer can type so yea, Ima change it. Ima check out rock auto. Thanks for the mad info, that really helps! Iono how to do the ports but ill just youtube or google, I'm sure ill find ways how to Do it . Thanks peeps!

Nave43

Just a few things that might each make a minute improvement.

Fuel injector cleaner,
Switching to fully synthetic oil
Replacing the fuel filter
Adding an external ignition coil to increase spark output

^ Also everything MAD MIKE said ^


Didn't realize how old this thread was until it was to late ...

94 accord typeR

grave digger!

MAD_MIKE

Meh, if economy is your thing using a different coil will not really do anything. If your current coil is failing just replace it with a Honda coil and Summitomo wires.

Now a spark plug like iridium's will aid in increasing more power to the spark for better light off.

Nave43

I was told a external coil would have better spark output therefor more completely igniting the mixture. Pretty much the same thing iridium plugs would do. The two together sounds like the ultimate.

Also when it comes to Hondas, NGK wires FTW. If you get plugs from the dealer they are NGK.

MAD_MIKE

No real benefit to changing to a different coil/setup for economy.
Not sure what dealership you go to, everywhere else you purchase the wires they are the stock black Sumitomo wires.
The Temple of VTEC - Honda and Acura Enthusiasts Online - Articles - Got to wonder about Magnecor wires...: NGK vs. OEM Spark Plug Wires

Nave43

They sell NGK plugs not wires.

purevwmetal

Not Accord related... But, When I had my jeep I put a CAI on it and cut the muffler out and put a straight pipe in. Sounded mean, and bumped my MPG up a bit. Changed plugs and wires. Keep the oil changed, and check tire pressures, and the air filter. You will be fine.

MAD_MIKE

Another data point.
Been getting ~30.5MPG in mixed driving. Noted a few more 94-97 Accords on the road and a large portion of them did not have the front wheel spats/mud guards behind the front wheel like my '95 EX has. Being everything is BLAAAAAAAAAAAAACK I didn't really notice them. Pulled them off, did my best to mimic last weeks commute, and I drove like a jackass to boot.
31.5MPG.

So if you still have your front factory wheel spats, and it's not raining/snowing. Take them off and save yourself some MPGs.

One other note, there was always a dull wind buffeting sound, not even noticeable. But once the spats were gone, the car is surprisingly quieter. There was also a weird oscillation that would occur in windy days/driving into the wind that is now gone.

Nave43

/\ Thank you for that my Sol has four of those ... cant be helping. I shall also pass this data onto my friend with an accord who makes at least a half hour commute each day.

There is a VX hyper milling thread somewhere here on honda tech with a prime example of wind drag eating MPG. Definitely worth a read if your trying to look for inspiration on saving gas.

\/ This guy is achieving easy 50mpg with a gasoline motor \/
https://honda-tech.com/appearance-bu...yling-3224910/

MAD_MIKE

Another data point. Current transmission in car is from a Odyssey. Final drive is somewhere around ~3.3:1 vs Accord ~2.8:1. It does make the car a bit more fun to drive and accelerate with, but if the proper Accord trans was installed I'm sure MPG would be closer to 35MPG if not more.

Nave43

Thanks im really trying to up my MPG but dont want to make a nooby thread about it. Problem is there are not very many threads on here that arent the basic (air filter, tire pressure, plugs, wires, fuel filter, oil, weight reduction, ex.) Which is disappointing being as i have already done all that (haven't changed o2s yet but that's next) and still am lucky to get 30MPG... i would add to this thread but dont drive an accord... So thank you for every bit of info that you post

MAD_MIKE

Ecomodder.com. Most common cars to mod are Geo Metros, and non Calif Civic HX or VX or whatever one that has the Lean Burn.

Nave43

VX has the lean burn, Im not sure how the CRX HF achieve there numbers. Thank you for the link although i have already been through there site. Every little bit of info helps.

Correction HX also has lean burn...

lazlong

Number one way to up MPG's is to go as easy as possible on the accelerator.

Nave43

and keep your revs around 2k and definitely under 3k.

I personally am trying to avoid going full eco so tips like this is what im looking for... i still like to go fast sometimes lol. While still squeezing every bit out of it i can being as i go on road-trips of easily 4-6 hours long one way. Thinking about getting solid rims to swap on for the long hauls, idk if anyone has mentioned that yet.

lazlong

Get as light a rim as possible. Any weight reduction will up MPG's.

Aerodynamics help too. Cover any holes in the front that aren't absolutely necessary for cooling. FWD cars don't really need a spoiler unless you're going 100+, all they do is cause drag. Window and sunroof vents are supposed to reduce drag if you like riding with them open.