97 itr
gsr block
b18b crank
12.38:1 pistons
rods
itr head
370 injectors
walboro pump 255
aem rail
spec C's
jg single springs
toda gears
sms header
sms exhaust
hondata s100
p28
no cat
last dyno with how its currently setup was 207 with 137

fuel filter has 5-10k on it
o2 sensor is 10months old
gas cap is fine and on right

symtoms....
volt meter reading from o2 drops into the negative on throttle at lower rpms. she chugs then works herself through it. Last tank of gas was horrible(but I WAS STUCK IN TRAFFIC for 2.5hours 2 days ago. tank before that was 27mpg with some real agreesive driving. Check engine light comes on spiraticly every other drive or so and shuts right off and goes away with the turn off of the key. First tank of gas was 93octane which is what the car was use to but i just put in a tank of 94 and its sputtering a bit less. Last week in traffic she was shutting down at stops(spec C's). I'm more or less posting this to get replies and for people to look at. temps here have dropped into the lower 30's and lows in the teens out of the blue right when this started. car was tuned when it was roughly 50degrees out. there is "some" sewt on the rear bumper

sooooo whatcha think. fuel filter? bad o2 sensor? fuel pressure needed to be increased? Injectors need cleaning? whatcha think

i'll take a look at the plugs tonight

 

have you changed the fuel pressure during this time period? I increased my fuel pressure and forgot to scale my map and the car was running so rich it would almost die in low RPM or Idle, but at higher RPM is seemed to make it through ok. Are you on a stock O2 sensor? Running a wideband?

 

no fuel pressure riser on the car or i would have. stock o2 and no wideband. just a volt meter on the pillar.

 

Im not positive but I believe the volt meter is reading off the O2 sensor correct? If the volt reading is reading low, then I believe that would mean the sensor is reading a colder temp. That could indicate a problem with the O2, or, you could be running rich which will lower exhaust temps(O2 sensor readings). Thats just a total guess though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2 &raquo;</TD></TR><TR><TD CLASS="quote">Im not positive but I believe the volt meter is reading off the O2 sensor correct? If the volt reading is reading low, then I believe that would mean the sensor is reading a colder temp. That could indicate a problem with the O2, or, you could be running rich which will lower exhaust temps(O2 sensor readings). Thats just a total guess though. </TD></TR></TABLE>

yes reading off o2 at ecu.

i would highly doubt if its running rich when temps out went to crap(colder). usually you increase fuel pressure a bit during the winter. i'd think o2, or something fouled out the plugs. i'd bet if there were a cat converter there it'd go away. oh...and the engine temps are defintely low. it hovers around 1/3 when i'm use to more like 2/5ths in my other tegs i've owned. coolant mixture is 60% water, 40% coolant

 

OT:


i dont know how many times i pushed, or worked on that POS....

What did fraley replace it with?

 

99 accord sedan with a fully built h22 turbo that originally dynod at 400 or 450whp and a 93 miata. oh wait...i owned them! He said he already played with a newer style cobra...well..the cobra tried anyway. now thats a sleepah

 

Lip,

I notice you actually have two fuel filters on the car. One stock one and one aftermarke one. I would def remove the aftermarket fuel filter. Judging from the pictures, first you dont need it, second it looks dirty. I would def. throw a fuel pressure regulator on that bad boy and see how it reacts to the fpr.

EVIL

 

Id definitely check the plugs as well. A friend of mine just had a problem with hesitation and misfiring at low RPM, but higher RPM is wasnt nearly as bad. Turns out his plugs were shot.

 

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

I notice you actually have two fuel filters on the car. One stock one and one aftermarke one. I would def remove the aftermarket fuel filter. Judging from the pictures, first you dont need it, second it looks dirty. I would def. throw a fuel pressure regulator on that bad boy and see how it reacts to the fpr.

EVIL</TD></TR></TABLE>

that filter is to the valve cover. between intake and valve cover. just stock filter for fuel. needs a regulator though

this photo shows that clearer http://www.we-todd-did-racing....D.jpg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2 &raquo;</TD></TR><TR><TD CLASS="quote">Id definitely check the plugs as well. A friend of mine just had a problem with hesitation and misfiring at low RPM, but higher RPM is wasnt nearly as bad. Turns out his plugs were shot. </TD></TR></TABLE>


definitely this evening

 

You been cleaning on that engine bay? I do not remember it looking that clean, then again I was half awake when I set her on her voyage to your place....

Jason

 

Take off the distributor cap and make sure that rotor button has not come loose...

Jason

 

jason i cleaned the car one time since it got here and never the engine bay.

i'll check it thanks

 

.....damn, you picked up fraley's 97?

That thing was ****** MINT.

 

was? i think its STILL in great shape

 

Lip,

We have come across code 43 on a handful of occasions. If you call Hondata they don't even know exactly what the cause is?

For the customers that have had it occur (3 I can think of out of hundreds of Hondata users) they have reset the ECU and have not had the problem reoccur until the weather changes again IE: fall to winter and winter to spring. No other reason beside weather that seems to trigger it????????????????????

Anyone else with thoughts?

Mattj


Modified by Dropspeed at 6:21 PM 12/4/2003

 

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

We have come across code 43 on a handful of occasions. If you call Hondata they don't even know exactly what it is?

For the customers that have had it occur (3 I can think of out of hundreds of Hondata users) they have reset the ECU and have not had the problem reoccur until the weather changes again IE: fall to winter and winter to spring. No other reason beside weather that seems to trigger it????????????????????

Anyone else with thoughts?

Mattj</TD></TR></TABLE>

43 Fuel Supply System defective or malfunctioning fuel supply system

I have it, it's been there for a while...started right after we modified the Cold Start Fuel Enrichment tables, I put the thermostat back to stock, but have yet to make it back down to the tuner to have him change everything back.

Austin

 

Try resetting the ECU Lip. I have heard Hondata has a hard time adjusting to major temperature swings like we are having now. Worth a shot, and if it solves the problem, costs is nothing...

Jason

 

reset ecu
plugs fine
distributor rotor fine

winter beater





60mph steady and this is the -reading

 

What sort of reading (units) is that Jeff? O2 Sensor voltage should be 0.85 ish. You have an extra decimal. Your picture above at 1.11 would be very high as well.

A number as low as .58 would indicate very rich wouldn't it? My brother just had code 43 qnd resetting the ecu and tightening the gas cap a few more clicks fixed it.

Trey

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lip &raquo;</TD></TR><TR><TD CLASS="quote">symtoms....
volt meter reading from o2 drops into the negative on throttle at lower rpms.</TD></TR></TABLE>

Normal oxygen sensor range is from 0.1-0.9 volts. A negative reading is usually a bad oxygen sensor. And a reading above 1.0 volts is also an indicator of a bad oxygen sensor.

 

from the get go i was pretty sure it was the o2. only second guessed it when i found out its age.

thanks for all the replies...o2 is next

 

strange that a 10month old O2 sensor is bad already. I guess anything is possible though.

 

well. driving through the snow i now have readings from +.5- +2.0

no detonation....but she didn't like that at all. o2 about to come out in the morn after i get it in the garage since the driveway is too slick.

i bet snow was hitting the o2 on the way home

 

Lip...
higher voltage=lean condition to the ECU, so it's dumping HUGE amounts of fuel, switch the primary O2 and the secondary O2 sensors, they may not be the same, but it'll allow you to drive for a while and tell you whether or not it's the O2 sensor.

But then again you may only have 1 O2 sensor which doesn't allow you to do this...maybe go steal one from the Prelude?

Austin