I have a 95 h22 swap in a 94 civci si.
running a stock p13 ecu. mods are Intake, and exhaust. And slightly ported stock header.

I only got 70 miles for a half tank of 91 gas.
I have egr hooked up. pep boys o2 sensor was done a bout 3 months ago.
ANd personally the car feels weaker than my previous h22 swap.

i have no codes!

can someone please shed some light on this.
thanks

 

wow I get about 200 to a half tank.


have you done the normal tune up plugs, wires, cap rotor?

Is you timming correct (cam, ignition)

are you egr ports cleaned?

cat clogged?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kulrevon &raquo;</TD></TR><TR><TD CLASS="quote">wow I get about 200 to a half tank.
</TD></TR></TABLE>

youre telling me you get 400 miles on a full tank?

 

if mostly highway.... I can as well....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honda_andy &raquo;</TD></TR><TR><TD CLASS="quote">youre telling me you get 400 miles on a full tank?</TD></TR></TABLE>

That's about right. I have about 300-350 on mine when I fill up and generally have 3-5 gallons still in there.

 

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

That's about right. I have about 300-350 on mine when I fill up and generally have 3-5 gallons still in there.</TD></TR></TABLE>

Thats about what I get.

 

Make sure u have good wiring.. Like grounds and stuff. I heard that sometimes h22 swapped civics have really bad grounds...IONO try it out, goodluck

 

i just got 300 miles on full tank prenium 91 octane but mostly freeway miles and my speed limit is usually 75-80mph

 

ok well
i have no cat.
all the tune up stuff was done about march.
that includes cap rotor plugs.
i didnt do wires.
how do you know if your egr ports are clean?
how can you check.
also what grounds should i check.

about 2 weeks ago i checked my ignition timing. and it was retarded (i oculd barely see the numbers/lines) so i set it back to like 15 using a gun.

how do i check the cam timing?
also would my mileage get worse if i removed all the egr crap and got a chipped ecu.

btw the most i ever got was 220 for 10 gallons. full tank.
now it looks like im gonna get 150 for a full tank wtf!

 

lol, well there's part of why you think our numbers are way high.

Prelude = 15.9 gallons.

 

ya um if you do the math
im gettin like 15 to 20 miles per gallon.

that is not good!

 

wait preludes hold 15.9 gallons? holyyyy ****...somethings wrong with my prelude than. When im on E i fill up, and it notes like...no more than 10 gallons. no wonder i go through gas like crazy. I bought the car from a previous owner- could it be possible (for some reason or another) he had the gas tank switched out to a smaller one by accident? I'll try to get pics up of mine but im really worried bout this- i didn't even know about how many gallons they hold.

 

hpw about you dont do that and stop trying to thread jack.
thanks

 

Yuo do relize that on older cars the the gauges aren't always right. On my 95 prelude si vtec it would stay on full for 60 miles then after a half tank it went to crap. Its like that with a lot of older cars. Also I have noticed that keeping your foot out of it also improves gas mileage.

 

yes i don know htat. ive been driving without a heavey foot.
but 75 miles and it s half tank is not goood.

 

maybe you just need a tune up like me. my gas mileage has dropped alot in the past month or 2. mostly highway driving h23a1 AT, i used to get about 400 with like 2 gal left. now its like 350ish with 2 gal or less left.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelude252 &raquo;</TD></TR><TR><TD CLASS="quote">Yuo do relize that on older cars the the gauges aren't always right. On my 95 prelude si vtec it would stay on full for 60 miles then after a half tank it went to crap. Its like that with a lot of older cars. Also I have noticed that keeping your foot out of it also improves gas mileage.</TD></TR></TABLE>

I have that going on with my 93 right now...If I fill it up to the max then I can go about 75ish miles before the hand moves...then once it hits 1/2 tank...HORRIBLE!!! LoL!

 

yeah once i get past 80-90miles on the trip-meter, the gas gauge automatically jumps from full to two bars, and normally it would be 150 at 3/4ths and at 1/2 it would be 230-250.

 

ok i just checked the fpr. by pullin the vacuum off and no fuel came spitting out.
i seafomed the car, and poured a lil seafoam where the whole for the map sensor is.

i guess im gonna half to check the plugs later.

so thre is no confusion.

i was gettin around 120 to the half tank.
now im gettin around 80

 

How much was that O2 sensor? Might want to stick another one in there and see if it's any better.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by http://www.bennettauto.com/oxygen_sensors.html &raquo;</TD></TR><TR><TD CLASS="quote">What Can Go Wrong

As noted earlier, a properly operating O2 sensor can respond to changes in exhaust gas composition (go from a low voltage, 200 mV signal to a high voltage, 800 mV signal) in about 100 milliseconds.

Problems arise, though, when the O2 sensor is no longer able to respond that fast, or to measure accurately the amount of oxygen in the exhaust. Under those conditions, the engine no longer operates efficiently and rich or lean conditions can occur for protracted periods of time.

The result is poor driveability, manifested by one or more of the following symptoms:

• decreased fuel economy
• hesitation on acceleration
• stalling
• surging
• rough idle and
• increased tailpipe emissions (with a likely failure of emissions tests, where mandated).

In addition to driveability problems, a faulty O2 sensor can lead to premature failure on the catalytic converter.

The most common causes of early sensor failure are deposits on the probe tip that prevent the tip from accurately measuring the amount of oxygen in the exhaust gas. Silicone, condensed water, and some oil additives can contaminate the sensor.

In addition, sensors can be subjected to extreme temperatures, oil fouling, carbon deposits, and the corrosive effects of a myriad of harmful chemicals during a "normal" life. Eventually, even the best oxygen sensor, operating in the cleanest engine, will wear out.</TD></TR></TABLE>

 

it was 70 bills
anyway to test

 

oh and how do you hoook this up/
i know one end goes to the canister
which end!

also what are the pinouts.

this came off the swa but never got hooked up

http://i6.ebayimg.com/02/i/04/fe/72/eb_1_b.JPG

 

where is it what does it do. Im talkin about the evap.
i searched all day

IM trying to get my gas milage good.

i hooked up everything except i dont know where the hell the two way valve is.

everytime i find a diagram theres just an arrow pointin up saying "to to way valve"

help!

seee!
http://home.comcast.net/~scott...m.jpg

 

Your civic has a smaller gas tank that the prelude but you should be getting more mpg
than you are getting. Sound like you need to be tuned.

 

ok so can i do that myself?

i have an auto p28/

i heard i could convert that to manual.
then what chip should i use. i also have a laptop.