I've been getting bad mileage on my 6th gen accord. My mods include a removed resonator, but I don't think that'll affect the mileage that much. I've even reset the ECU, but to no effect. Don't think its a cat or anything...could be a dirty fuel injector?

 

have you performed regular maintenance?

 

yeah oil changes and filter changes. could it be the air filter? it doesnt look that dirty to me. its only spotty black.

 

i have the same problem with my 5th gen and still didnt narrow it down yet... but for what i done... 230-250 and my light comes on... minor bolt ons only everything else's stock now. 130k never had a cel code thrown, never in a accident...

Sparkplugs/ wires
fuel filter / air filter
changed cat/ new exhaust pipeing
oil change / tranny fluid change
checked for binding brakes
changed o2
throttle body, exhaust manifold, head gaskets changed...
performed vacuum test's
changed injectors...
cleaned egr then blocked it...
timing checked...
used techron and redline injector cleaners...

things i didnt do....

compression test...
voltage checks...

 

i've got bosch platinum +4 spark plugs...could that make it run rich? or the fact that i'm running w/o resonator?

 

i doubt its your resonator... try changing the air filter if you are unsure of the condition.. if you have high mileage could be your o2 sensor, or even a clogged catalytic,,, you can always perform test's to give you a definate answer on those.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MAFA &raquo;</TD></TR><TR><TD CLASS="quote">i've got bosch platinum +4 spark plugs...could that make it run rich? or the fact that i'm running w/o resonator?</TD></TR></TABLE>

However, it could just be your driving habits

Do you always just step on it no matter where you are or do you gradually lower your foot to the pedal, brake hard?? take corners fast?? Constantly in stop and go traffic?? maybe you drive fine though....

 

I dont think it could be the cat, as they age they restrict the airflow more but I do not think that could be grounds for 19mpg.....especially on an accord

 

i've been keeping revs under 3500 for this last tank and i still get 300 miles on a 17 gallon tank

i havent done this list though:
Sparkplugs/ wires
fuel filter / air filter
changed cat/ new exhaust pipeing
oil change / tranny fluid change
checked for binding brakes
changed o2
throttle body, exhaust manifold, head gaskets changed...
performed vacuum test's
changed injectors...
cleaned egr then blocked it...
timing checked...
used techron and redline injector cleaners...

things i didnt do....

compression test...
voltage checks...

 

Throw those +4's away! IMHO

 

thats crummy man...with all the mods ive done i get amazing gas mileage now

 

4 of those gallons are reserve.............

if i take it easy on my accord i get like 25mpg and thats with turbo....

 

air filters really makes a difference, or it seemed to have for me.

 

On the topic of spark plugs, I'd opt for good ol' NGK copper plugs. Check your plugs to see if it's white or black with soot. Then check your exhaust piping including your headers to see if you have an exhaust leak somewhere. And also check your IAT sensor.

And if in doubt, send your oil for analysis: http://www.blackstone-labs.com.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MAFA &raquo;</TD></TR><TR><TD CLASS="quote">i've been keeping revs under 3500 for this last tank and i still get 300 miles on a 17 gallon tank...</TD></TR></TABLE>How are you calculating mileage?

Fill up your car, reset the trip odometer. Drive it until the tank is low, fill it up again, divide the miles driven by the gallons it took to refill your tank.

But yes, you should be getting much better mileage, even if you have an automatic. My '99 lx 5-speed gets ~ 26 / 33mpg, with 87 octane gas.

 

yes, get new filter...i only got 350 miles with my old filter...it didn't look dirty or anything...but when i washed it out...dirt came poring out...i went and got a new filter...and i got 415+ miles per tank...

 

that is a bit low

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Heat &raquo;</TD></TR><TR><TD CLASS="quote">How are you calculating mileage?

Fill up your car, reset the trip odometer. Drive it until the tank is low, fill it up again, divide the miles driven by the gallons it took to refill your tank.

But yes, you should be getting much better mileage, even if you have an automatic. My '99 lx 5-speed gets ~ 26 / 33mpg, with 87 octane gas.</TD></TR></TABLE>

I do that. It's a slushbox.
Which sparkplug? I don't see copper.
NGK 2477
Iridium IX; ZFR5FIX-11; @ Gap .044" @
3 Month Limited Warranty Ships in 1 day
Weight: 0.4 lbs. $6.99



NGK 4363
Platinum; PZFR5F-11; @ Gap .044" @
3 Month Limited Warranty Ships in 1 day
Weight: 0.4 lbs. $9.98



NGK 7098
G-Power Platinum; ZFR5FGP; @ Gap .044" @
3 Month Limited Warranty Ships in 1 day
Weight: 0.4 lbs. $2.99



NGK 2262
V-Power; ZFR5F-11; @ Gap .044" @ Find in a store Ships in 1 day
Weight: 0.2 lbs. $1.98

 

3 gallons are the reserve, the light comes on at 14 gallons used, 17 gallon total tank capacity. You better recheck your gas mileage calculations.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by First Honda 1976 &raquo;</TD></TR><TR><TD CLASS="quote">3 gallons are the reserve, the light comes on at 14 gallons used, 17 gallon total tank capacity. You better recheck your gas mileage calculations. </TD></TR></TABLE>

I'm telling you, I see how much gas I use when I fill it up. I divide the trip odometer by the amount of gas I put in. It's 18 mpg.

I just put in my OEM plugs. It feels different---less pull throught the rpm range...It could be one of two things: a placebo effect or my OEM plugs have more miles on them. Some boys on the miata forum dyno-tested the +4 against the Bosch Spitfire and saw no difference. After they put in the NGK Coppers, a 3 hp gain.


Modified by MAFA at 7:28 PM 5/6/2004

 

u guys complaining about getting 315-400 miles per tank??!!!! ionly get 215mpTank on my 98 accord. thats only , well i think b/c i live in NYC where im always in stop n go traffic. plugs made a huge diffewrence though when i bought this car last yr. ngk plugs and wires. is that normal for the city driving?

~98 accord EX~
~132k 5 speed~ Runs like a champ!

 

lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SIMATIC &raquo;</TD></TR><TR><TD CLASS="quote">u guys complaining about getting 315-400 miles per tank??!!!! ionly get 215mpTank on my 98 accord. thats only , well i think b/c i live in NYC where im always in stop n go traffic. plugs made a huge diffewrence though when i bought this car last yr. ngk plugs and wires. is that normal for the city driving?

~98 accord EX~
~132k 5 speed~ Runs like a champ!</TD></TR></TABLE>

A- freaking men!!! i keep thinking its my car only i do daily NYC driving also, got 230 till warning comes on, and after i changed my i-rotor im getting 260-270 before the light... but mines a 5th gen with 133k around.

 

what is a "i-rotor"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mike813 &raquo;</TD></TR><TR><TD CLASS="quote">

A- freaking men!!! i keep thinking its my car only i do daily NYC driving also, got 230 till warning comes on, and after i changed my i-rotor im getting 260-270 before the light... but mines a 5th gen with 133k around.</TD></TR></TABLE>

Do you run your A/C alot? I know my mileage stinks when i run it....i'm not sure of the condition of my compressor bearings....lots of parasitic drag.