Resetting your ECU with BIG`O

[BIG`O]

Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!


After installing or performing modifications to your car ~ ie. throttle body, manifold, intake or exhaust; it is good to reset your ecu and "run it in". This is because it resets your air/fuel mixtures, allowing your ecu to "learn" your current setup.
so if you have recently changed either of the items mentioned above, i highly recommend that you partake in the following.

anyway to start things off:
STEP #1
after popping your bonnet - find your fuse box (passenger side just behind your battery on a dc2/4 integra ~ see pic)
http://dod.ausgamers.com/files/shaneo/reset_ecu_image01.JPG
http://dod.ausgamers.com/files/shaneo/reset_ecu_image02.JPG
STEP #2
locate your "ecu fuse" (top left, 15AMP on your dc2/4 integra ~ see pic) and remove it (and the 7.5amp "backup" beside it) carefully using either fuse clamp or long nosed pliers.
http://dod.ausgamers.com/files/shaneo/reset_ecu_image03.JPG

STEP #3
wait 10 minutes, good time to take a random pic or two.
http://dod.ausgamers.com/files/shaneo/reset_ecu_image04.JPG

STEP #4
re-install the fuse (see pic) and then start car and let idle for at least 10 minutes minimum, (during this time dont touch anything!! no revs, nothing!!!) once its warmed up, go for a burl and make sure all is good.
http://dod.ausgamers.com/files/shaneo/reset_ecu_image05.JPG
YOUR DONE!

enjoy your :honda: honda :wave:

[Stoosh]

could you please tell me what the advantage of resetting your ECU is?

[egads]

might want to take the one beside it out aswell. ecu backup

[BIG`O]

could you please tell me what the advantage of resetting your ECU is?

fuel economy mainly.
do a search :)

[twing]

How about other car? which one to pull?.. What's the label in the manual?
Is it the 'FI E/M (ECM/PCM)' and 'Back Up'?

[mrwillz]

fuel economy mainly.
do a search :)

yes that is quiet true

ive recently done (well cudnt avoid it)
and it did giv me an increase in fuel economy
i was avg about 430km wen it was on the brink of fuel light coming on, jus recelty got over 450km+ wifout the light being on.

i kud also somewhat feel that the car is performing a lil smoother on the go

its a good lil tip to reset ecu. u got nothing to lose.

[BIG`O]

work a treat ^_^

[hotboxcivic]

supposedly the ecu goes back to the original state it was in before the reset..

[BIG`O]

supposedly? prove it. my fuel economy is amazing.

[hotboxcivic]

big ben himself reckons so! :p

how reliable is that guy away?

[JasonGilholme]

your air fuel rations will go back to the factory values to ensure good fuel economy. In saying this tho, the only time you should do this is if you've done mods to your car such as air filter and exhaust.

IF you throw a different air filter on your car without resetting the ecu and jump straight in and fang it down the street. THe car won't be ready to handle the excess air that is being fed to it. If you reset the ecu and let it idle for a short period of time, it gets used to the new amount of air.

Just because the ratios are going back to factory settings doesn't mean your car is going to be stock. It just means it will be able to handle the excess air that the engine is being fed. Which means a smoother ride and a bigger advantage from doing mods.

Jase

[jooboo]

hwo come u didnt remove the 7.5 fuse too??

[twing]

How about other car? which one to pull?.. What's the label in the manual?
Is it the 'FI E/M (ECM/PCM)' and 'Back Up'?
Could someone help me with my question?

[BIG`O]

hwo come u didnt remove the 7.5 fuse too??
because i am noob. haha yeah take it out too

[JasonGilholme]

Could someone help me with my question?

If your unsure on which fuse to pull you can always undo the negative terminal of the battery.

[twing]

that means head unit needs security ID... and I lost that bloody id.

[Pokiou]

from what i remember in the sr20dets ECU's when you reset the ECU it goes back to learning mode... which means it learns the cars new Air and fuel ratios.. in honda's im not to sure :(

Pok

[BIG`O]

from what i remember in the sr20dets ECU's when you reset the ECU it goes back to learning mode... which means it learns the cars new Air and fuel ratios.. in honda's im not to sure :(

Pok

correct. should be the same with most cars...

[SiReal]

When I did that (and thanks for the write up), the car was sitting stationary on for a while and it got REAL hot under the bonnet. Would that affect the ECUs judgement of intake temp then?

[JasonGilholme]

Shouldn't do. All it means is that the car will know what to do with the fuel delivery IF your temps ever get that high again.

Also, when you get back into your car to go for a drive, you should try and take it slow through the gears and use most of the rev range. That way it has more time to adjust to the new air flow throughout the entire rev range.

I forgot to do this once in my car and it was running shit for a while. hesitant acceleration as well as poor fuel consumption. Reset the ECU again, let it idle and took it slow and she's been runnin sweet every since.

[SiReal]

thanks for taht Jason, good stuff. Its running fine atm, i might just reset it anyway to make sure.

Btw, great to have seen you stick up for OH on that 'other' site :)

[JasonGilholme]

No probs mate.

OHS sux. lol

[CUL8R]

though honda dont like it when u do this coz u do clear all ur errors on ur ecu, does sometimes make things hard to check diagnostics.

[CRXer]

If ignition is off u only have to remove the back-up fuse and only for about 20secs if ur impatient or just bleed off any charge by grounding the load side of the back-up fuse terminal if super impatient or just to make sure its dead.DO NOT GROUND LIVE SIDE OF FUSE for obvious reasons or u like looking at a big blue spot in ur vision for a few hours.If u dont know diff between live & load just be patient.
Also if it helps anyone,the ED CRX ECU is backed up by the hazard circuit.

[panda[cRx]]

that means head unit needs security ID... and I lost that bloody id.

call ur local honda dealer with your VIN number mate. they'll do a hondanet check and u'll have it in under 2mins

[spardikis]

just work by the code - if u mod your car and have a stock ecu...pop the hood and take out the 15a PGM-FI main relay fues. wait ten mins, put the fuse back in, start the car and let it idle for 10mins, then slowley work thru the gears and revs.

Vollah!

[Terry]

can i do that for my civic as well? any one have write up or pic to follow? i search but nothing comes out -__-"

[spardikis]

yup, do the same. pop the hood, take out the 'PGM-FI fuse, or just disconnect the black battery terminal (make sure you have ur alarm and stereo worked out for power failure!!!) and your away. u cant go wrong if u pull the PGM-FI fuse. otherwise, just unplug your ecu and leave it for 10 mins, then follow the other steps.

[Pokiou]

I just reset my ecu.. unplugged the fuses for 30 minutes.
plugged it back up let the car idle till it was warm with the bonnet down.

then took it up and down the street easily reving 1st 2nd and 3rd out..

results..

the car runs smoother and is more sharper on acceleration(responsive).
i reckon this should be done after everytime you change something on the car...

Good technical help!!!!!

[CRXer]

^^
u cant go wrong if u pull the PGM-FI fuse

Dont like correcting people but did u read the rest of the thread.
Pulling just the ecu(PGM-F1)fuse effectively does nothing seeing as ur ignition key disconnects this fuse from the ecu everytime u turn it off.

You need to pull the BACK-UP fuse for the ECU

Which is a 7.5A on tegs,associated with ur clock,stereo etc
A 10A fuse labelled Hazard Lights on a Gen 2 Crx
The others i dont know,somebody fill in the blanks......

[ECU-MAN]

^^

Dont like correcting people but did u read the rest of the thread.
Pulling just the ecu(PGM-F1)fuse effectively does nothing seeing as ur ignition key disconnects this fuse from the ecu everytime u turn it off.

You need to pull the BACK-UP fuse for the ECU

Which is a 7.5A on tegs,associated with ur clock,stereo etc
A 10A fuse labelled Hazard Lights on a Gen 2 Crx
The others i dont know,somebody fill in the blanks......

you have to pull the fues like CRXer said above. 7.5 amp backup fues for 30 seconds

any longer is overkill

[spardikis]

amended>>

[TYPE-ONE]

when is the best time to do this. in the morning. midday. evening. or midnite.

[JasonGilholme]

when your hungry!?!?! lol

Anytime should be fine. It only takes 10 minutes MAX to do.

[TYPE-ONE]

but i mean like with respect to weather conditions. would it be better on a cold night or a warm day.

[JasonGilholme]

AHH i see. sorry. lol

Good point. not sure. I spose the ECU will learn the best AF ratio for a certain temp when it encounters it.

That might be one for the ECU kings.

[TYPE-ONE]

ok cheers mate.

[BIG`O]

but i mean like with respect to weather conditions. would it be better on a cold night or a warm day.

my guess would be when u drive the car the most. but overall i think it would know its own temp etc. engine bay temp would stay pretty regular..

[maxtron]

what happen when you over kill it?

[ECU-MAN]

what happen when you over kill it?

nothing


other than having time on your hands to look at your engine bay and wonder what you can do to make it go better.

[maxtron]

well i tried to reset my ecu on my lude
its not in the engine bay near the pedals

anyway, after taking out 2 ecu fuse and 1 back up for 10 mins
then putting it back...got it ready and everything turned off......it doesnt start

all the electric works fine, eg power windows, lights

after leaving it for a few hours the startter motor doesnt sound like it want to kick in

any ideas what happened?

[ECU-MAN]

do you have an aftermarket alarm.

that could be immobilizing the engine.

Batt isnt flat is it.


your ignition switch isnt playing up at all. ( common on 92 -96 )

[maxtron]

i do have an aftermarket alarm (viper)

it seem like everytime i try to start it
the battery gets flatter

so i dont know whats wrong

might check the alarm (thanks for that...total forgot about the alarm part)

[yfin]

though honda dont like it when u do this coz u do clear all ur errors on ur ecu, does sometimes make things hard to check diagnostics.

Is that the case on all Hondas? I was reading about a guy in the USA with a CL9 TSX (similar to Euro) - he wanted to clear an overrev code on his ECU. The advice given on the US forum was he needed to get a scan tool to clear the error.

[dynosaur]

it is really works for my car , thank you very much BIG'O~~!! u save me alot of $$ :)

[ECU-MAN]

pgmfi or srs ecu ??

[CUL8R]

oopsy.....yeah i posted asking the q about what the backup fuse for my 98 lude is
hey thanx ecu man...u r the man!

if i just disconnect the battery that should do the trick??? or will it not clear the error codes?

[ECU-MAN]

under hood fues box

7.5A clock radio fues

remove for 10 sec

[CUL8R]

omg i could kiss u ecu man.
mwa ewwwww.mwa ewwww...mwa mmmm pizza...mwa ewwww

[ECU-MAN]

ill take the zero

lol

thats fues only does PGMFI

[CUL8R]

lol yeah just read ur post in the steering wheel thread about resetting srs, posted one last Q lol...thanx so much for all this mate

[BIG`O]

just did it again, fuel economy started dieing on me...

[Killa From Manila]

so u remove both fuses at same time (15amp ~ 10 mins, and 7.5amp ~ 30 secs) or just the 7.5amp fuse 4 30 secs. then let the car idle 4 10 mins. theres been so many opinions on this im confused wat to do ><

[BIG`O]

be on the safe side, i just take both out for 10 mins
then idle for 10 mins, then drive how you most likely do, but occassionally going through the revs so it can 'learn'

[L-Plates]

so if i have an aftermarket alarm should i do it..!?!
if i pull out both fuses will i lose all my settings on my headunit etc..!?!?

[destrukshn]

yes you lose your settings on the head unit.
lol.
that's why i ain't doin it.
cbf going through em again.
lol.

[TonySo]

I tried to do this on my EF this morning...

I unplugged the ECU fuse under the bonnet and the Hazard relay under the dash for 2 mins, but when the fuses are unplugged i tried to press the hazard light and indicators still blinks :confused:

Is that right??

[CRXer]

You dont have to remove the ecu fuse,just make sure the ignition is turned off.
You have to remove the hazard FUSE for the ED-EF for 10-20 sec located in the same place as the ecu fuse,under the hood.

[ECU-MAN]

You dont have to remove the ecu fuse,just make sure the ignition is turned off.
You have to remove the hazard FUSE for the ED-EF for 10-20 sec located in the same place as the ecu fuse,under the hood.


:thumbsup:

[egSi]

it only takes 3mins to reset not 10.

[cool_filo]

one quick question when you rreset ur ecu do you close your bonnet or keep it open?? cheers guys

[mrwillz]

^ lol
u mite as well leave it open for the duration of restting it
cant hurt
then wen u start the car up after resttn u can see wen the fan kicks in then ur good to go

[ECU-MAN]

its only takes 30 seconds to reset the ECU, just open your bonnet, pull the 7.5A backup fues, 30 seconds later put it back in, then close yoru bonnet.

simple as that. !!!!!

[egSi]

its only takes 30 seconds to reset the ECU, just open your bonnet, pull the 7.5A backup fues, 30 seconds later put it back in, then close yoru bonnet.

simple as that. !!!!!

what about the glove box john? leave it open? close it? thats wont short it out?

i dont want to wreck my ecu and i heard that if you reset the ecu for too long, it can wipe away vtec? WTF!? thats scary! :eek:

[ECU-MAN]

just make sure your spare tyre is at 40psi before you do it and you will be fine.

[egSi]

just make sure your spare tyre is at 40psi before you do it and you will be fine.

will do ;)

[CRXer]

lol,was just trying to dig up that previous spare tyre post of yours........

Think you should start a new thread,list up all the different backup fuses,lock & sticky it.

[BIG`O]

oi trav your pretty fkn funny bro..

[spardikis]

how could you possibly wipe your vtec when you dont even have it:P

[EK4R]

when you guys said going through the revs slowly. that as in revving slowly up to redline or the normal easy shifting at 2-3k rpm?

[BIG`O]

rev slowly to redline, then slowly down. just accustomizes it better. or if you want it to learn for track, just revv the fcuk out of it..

[MvP]

hey Big O i got a question for u.
wat happens if u take both the fuses out, and then try to start the car?
Im asking this becuz i did it and wanted to know if thats affects the car?

[Honda Enthusiast]

Just say if I don't reset it...wouldn't the computer automatically recognise the change? I drive a 1998 vehicle so it should be smart enough, right? If I don't reset it, doesn't harm the car at all besides the slight urge to drink a bit more petrol?

[kimo]

What about just take the battery cable out, isn't that a lot easy.

[CRXer]

What about just take the battery cable out, isn't that a lot easy.

not quite as easy as popping a fuse in & out.

[ECU-MAN]

What about just take the battery cable out, isn't that a lot easy.

yeah, if you like resetting all the radio security code, station presets channels and the clock.

its much easer to do it through the fuse. only disconect the batt if your not having any luck finding the corect fuse.

[ErazeR]

thats awsome idea :)

[Honda Enthusiast]

What about just take the battery cable out, isn't that a lot easy.


Easy....

but... if you got an alarm wired with sensors and shit in your engine bay... damn, reset the battery will kill your ear drums.

[ProECU]

Easiest way I find, is to remove the connector plugs from the ECU.

This will remove the constant power source and all RAM stored parameters in the ECU will be cleared.

[kyle]

Easiest way I find, is to remove the connector plugs from the ECU.

This will remove the constant power source and all RAM stored parameters in the ECU will be cleared.

Correct! :thumbsup:

This method will also remove any viruses you have contracted from the internal flux processor. :)

[spardikis]

please lets all have a big ozhonda hug and perhaps we can make out. oi who cares, just pull the plug, and take off the battery cables.. what ever! its all good

[Encor3]

read through everypage i jus had a look under the bonnet of my ek4

which fuse is the ecu i cant figure it out SORRY FOR THE NOOBNESS :$

[Toycivic]

so can u do all this in the morning when the engine is still cold, or do u have to have warmed up the engine ? coz the motor tends to rev high during idol wen its cold, will this affect the outcome?

[040501912]

yeah i do have the same Q as toy civic

[Limbo]

Guys. Pull the fuse for 30sec OR If you can't find it pull Battery Plug for 10mins.

Then start car - Idle for 5 mins or so until the car is warm. Do not touch the accelerator whilst waiting.

Take car for a drive, revving thru slowly up to redline and let it go down slowly. Prob do this a few times just for goodluck. Then you should be fine.

I don't think i can say it any easier.

[vippy84]

If your unsure on which fuse to pull you can always undo the negative terminal of the battery.

I unplug both terminal + and - for 15 mins? will that do the resetting?

[solitz]

yeah it will vippy84

[VTAKYO]

hmm bit confused which fuse do i take out i dont have a 7.5a

and wen u said slowly rev to redline is that for everygear ..

[ECU-MAN]

you dont have to rev your car to red line.

just let it idle in Park for AT or N for MT for 10 min ( untill the thermo fans kick in twice ). make sure there is no electrical load on the car. Turn off all accesories, inc the radio.

[VTAKYO]

k thx for clearing that up
so u noe which fuse to take out ..
i have a dc5r

[Ph@t-G]

Ok I've trolled through this DIY, with one other person having the same question I have.

When removing the fuses (in my case EK1), is it the "FI E/M (ECM/PCM)" and "Back Up" fuses as listed in the owner's manual?

Nice and easy question...

Cheers

[Alpine]

When resetting the ECU does the engine already need to be warm or can it be done cold?

[XP02ED]

k thx for clearing that up
so u noe which fuse to take out ..
i have a dc5r

Just take the battery out thats what i did,

Cant seem to find anywhere what each pic means on the engine fuse box :S!
IF anyone knows or got a link pm! THANK!

[Simmo2302]

hmm.. seems to b a bit of confusion here.

this is my gist on things...

1. find ur fuses (check a manual) and unplug em for anything up to 10mins.
or
2. disconnect both battery cables for anything up to 10 mins
or
3. unplug the connector for the ECU itself, for anything up to 10mins.

once done reconnect whateva u did, and idle engine for 10mins, turn all accessories off (ie radio).

after 10 mins of idle take car for drive, changing gears at appropiate times/speeds (usually found in honda owners manual) do this for some time ie 10 mins, so ECU can learn air/fuel ratios for normal driving.

when satisfied, if u want to, drive ur car like its stolen, so ecu can learn ratios when engine is under strain (ie when racing).

can be done on cold or warm engine, or a sunny / mild day.

somebody correct me if i m wrong.

(times may vary due to personal preference)

[Alpine]

Just a warning to those who are unplugging the fuses, in particular the backup fuse which also serves the Radio...

Doing this fried my Alpine head unit completely for some reason. I had to purchase a new head unit in the end.

Beware.

[Simmo2302]

hmm... sounds like u got a power surge, but dont know y, unless u had the ignition in the on or acc position.

i dont kno about alpine, but my pioneer has a fuse (round glass type) behind the headdeck on the power line aswell (in a black case lookin thing).

if urs has it, maybe u blew it.

if not maybe as a precaution u better cut ur power line and put another fuse in there, just incase.

[andiiso]

so by resettin ECU, will it stuff my headunit settings, and aftermarket alarm system up? or they have absolutly nothing to do with it ?

[Simmo2302]

so by resettin ECU, will it stuff my headunit settings, and aftermarket alarm system up? or they have absolutly nothing to do with it ?

resetting the ecu will stuff up those things if u disconnect the battery terminal. or if those things are in the line which the fuse is off.

[hondavti25]

would this be worth doing if i just have a really basic SRI and cat back exhaust with stock cat?

[andiiso]

well i know which 2 i have to take out so i dont have to disconnect the battery terminal but how do i know if my alarm is in line with the 2 ecu fuses ?

[Simmo2302]

would this be worth doing if i just have a really basic SRI and cat back exhaust with stock cat?

as far as i m aware, any change to the intake which allows more air than what the ecu is used to, needs to have the ecu reset so i can learn/adjust to the new setting.


well i know which 2 i have to take out so i dont have to disconnect the battery terminal but how do i know if my alarm is in line with the 2 ecu fuses ?

i guess it was a professional install? have a look 4 the control box and c where they pulled the power from. if not try it neway, but know how to reset the alarm first.

[hondavti25]

sorry guys but any more specifics on which fuse to take out on an ej8? and how do i know its that fuse?

only thing i can find fuse wise is under the steering wheel but theres a fair few there just dont no which ones which ?

[JasonGilholme]

cause it says so on the fuse box lid.

ECU Fuse
Back up Fuse

Its not hard guys. come on.

[hondavti25]

cause it says so on the fuse box lid.

ECU Fuse
Back up Fuse

Its not hard guys. come on.

sorry man i wasnt thinking i found it so if i use pliers or something like that and take the fuse under E / M and back up out ill be sweet?

[JasonGilholme]

yep.

Also, don't worry if you have an alarm. if it is connected up to the ECU fuse its gonna be the same as if you disconnect the battery anyway. Just make sure your car is unlocked when you do it and you'll be fine.

[hondavti25]

yeah i dont have one so ill be all sweet thanks and does it matter if that car is just warm when i do this or it has to be bone cold?

[JasonGilholme]

nah doesn't matter if its warm. or not.

I'd probably just do it one morning before you go to drive the car to work or something.

Just wake up and pull those two fuses, go start to get ready eat breakfast etc, pop the fuses back in and start her up. Let her warm up a bit then drive her to work nice and slowly going through the majority of the rev range.

[andiiso]

yea say my car is unlocked, and i go reset my ECU, and it does have effect on my alarm,, yea i will still be able to go and get in car n start it but how do i lock it afterwards ? etc.

[JasonGilholme]

the same way you did before. Nothing changes.

Its exactly the same as if you get a flat battery. You replace the battery and everything is back to normal.

[andiiso]

oh i see, i thought the "back up" fuse is so that if my battery goes dead things will still be remembered, and i thought since resetting means taking that fuse out too, then i thought nothing in relation to the ECU will b remembered unlike the dead battery but yea, im dunno, but now sounds a little more reassuring to do this ECu thing, thanks

[JasonGilholme]

theres no other power supply in your car apart from the battery.

THe backup fuse for the ECU is to prevent any damage to the ecu if an electircal short occurs. It has nothing to do with maintaining power in the event of a flat battery. :thumbsup:

[nick_sixx]

hey is it bad to drive a little more 'spirited' after youve done an ecu reset.....my car was driven by a grandma before i picked it up, so im told doing a reset would be useful.....and i want to know if i should drive conservatively after a reset...

[dc2dc2dc2]

don't bother with reset dude.
and have u even bothered to read this thread ? it is quite detailed.

[Simmo2302]

@ Nick_sixx

i find if i reset the ecu i get my fuel efffiency back, but if i flog it after reset, after 2 weeks of flogging it, i need to reset again as fuel effiency drops dramatically.


after reset i use 6.25 - 6.60 Litres per 100km (thats 15-16km per litre)

after flogging it i use 11+ litres per 100km (thats 9 km per litre)




(i base my results on 80&#37; highway driving 20% or less round town as i travel 50km each way 2 and from work inbetween towns - sux working in the country)

[DC4Integra98]

Sorry to revive a fairly old thread but relevant to my question,
Flogging = revving it out hard to 6k revs gears 1,2,3?

If so, oops....

Time to reset again???

[Simmo2302]

Sorry to revive a fairly old thread but relevant to my question,
Flogging = revving it out hard to 6k revs gears 1,2,3?

If so, oops....

Time to reset again???


lol yea floggin = driving the car hard, ie racing.

cant hurt to reset the ecu, u can only end up saving on ur fuel bill ;-)

[DC4Integra98]

lol yea floggin = driving the car hard, ie racing.

cant hurt to reset the ecu, u can only end up saving on ur fuel bill ;-)

Yeah I will try it out. I only flogged it for a good 10-15mins or so hopefully I don't have to go resetting it and hopefully driving it easy can fix from now on. (I'm lazy)

[IEVAQ8]

its funny that you say to resaet your comp as you make mods, because the computer will re learn the new mixtures and what have you............
well if u was me, u just answered ur own question, it dont matter what mixtures and previouse settings it has, if its a self learning computer, it will eventually re tune itself alone to the new mods..........and then it will also have the base map, which in fact is prob a good thing and wont run like shit on different weathered days, coz by u reseting it with mods and crusing around, it will take all data from that drive, then every time u have different weather or drive it differentl;y, it will be learning again.........so my opinion, no need to reset if its al;ready a self learning ecu........................

[DC4Integra98]

its funny that you say to resaet your comp as you make mods, because the computer will re learn the new mixtures and what have you............
well if u was me, u just answered ur own question, it dont matter what mixtures and previouse settings it has, if its a self learning computer, it will eventually re tune itself alone to the new mods..........and then it will also have the base map, which in fact is prob a good thing and wont run like shit on different weathered days, coz by u reseting it with mods and crusing around, it will take all data from that drive, then every time u have different weather or drive it differentl;y, it will be learning again.........so my opinion, no need to reset if its al;ready a self learning ecu........................

So are DC4 ECUs self learning by any chance? I really don't want to be driving around with a terrible fuel economy especially with fuel prices these days...

[IEVAQ8]

i believe so................

[Simmo2302]

even if that is tru and the ecu will re-learn to be fuel efficient, how long will that take ? it may take a week of bad fuel economy b4 it goes good again.

i have a 2002 civic and when the ecu is out, i can go thru up to $10 of fuel a day, thats shocking compared to what it usually should get.

i'd rather reset the ecu and get good fuel economy straight away, than wait till the ecu re-learns to be fuel efficient again.

well thats just my 2cents neway

[MWAKU]

so how to reset ECU for prelude 99 BB6 anyone?

can i just disconnect the battery (remove the + or - terminal?) and then turn the car on after that and let it idle for 10 mins, will it be the same shiet, instead of going to take out the ECU fuse from the fuse box

[trism]

its the same for every car

you can either remove the fuses, or disconnect teh battery fior 10 mins

connect back up, turn on, let idle for 10 mins

[MWAKU]

im more inclined to remove the fuses, but im just unsure which fuses they are on the bb6

so by disconnecting the battery, means unscrewing the bolt on the negative terminal, and then taking the lead off rite??

[trism]

yes.

the fuses will be labled ont eh fuse box. if you are still unsure, take sme pics and someone should be able to show you

[MWAKU]

** why is the prelude bonnet so farken heavy -_-**

ok anyway, so i am just going to pull the 7.5A / Clock radio fuse for 3 mins and then idle for 10 mins, thats all ay. sweet thanks/

[trism]

that wont do shit bro

the clock radio fuse is not the ECU fuse

just rip off the battery terminal for 10 minutes

then idle for 10 minutes

[MWAKU]

hmm then whats everyone going on about in this thread of the clock radi 7.5A fuse :S:S:S

which fuse is the back up ECU


i don't really want to disconnect the battery as i cbf to restore the headunit settings, and i don't know if theres a code on it, bought my car with it.


** wouldn't this be it, except there 10A is our 7.5A i think
http://www.preludeonline.co.uk/4ws-reset.html

btw nothing is labelled ecu reset

[trism]

take a pic of the fusebox and fuse diagram. like i said before

someone will tell you

[MWAKU]

Ok here are the pics, as you can see they are blurry as cause its my fone camera..

well the 2 brown fuses are the 7.5A.. one along with the rest is the clock radio one, and the one the just under the is the other 7.5A (under the 10A hazard)

http://i13.photobucket.com/albums/a285/mykulxD/27-10-08_1542.jpg
http://i13.photobucket.com/albums/a285/mykulxD/27-10-08_1543.jpg

[trism]

well you dont remove the clock radio one. as thats jsut for the clock and radio. if you do that, youll **** the radio, and maybe need a code. its jsut like disconnecting the battery.

[MWAKU]

Oh ok, now im confused, one person is telling me that i remove the clock 7.5A one, and your telling me it won't do anything lol.

wells, i guess if i remove the fuse it would be easier then d/c the battery.

what does the 7.5A do thats not labelled do if i remove it

[EVLGTR]

why 10 minutes??.....10 seconds is enough to do that

[NSPYRE]

talk about digging up the dead...

[CEEVIC]

cant even see the pics anymore