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Ecu Re-program/replace?


Chris0628

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Why not, as you're planing to change the transmission and ecu anyways :D

I guess, probably one on the exhaust manifold and sometimes another on the exhaust after the catalytic converter

yeah.. i guess that's the only option .....gonna meet Zakie tomorrow..... let's see how it goes....

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Why not, as you're planing to change the transmission and ecu anyways :D

I guess, probably one on the exhaust manifold and sometimes another on the exhaust after the catalytic converter

i think d15z4 doesnt have a one on the exhaust manifold.

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yeah... looks like it... guess there's only one & it's underneath .....

the one underneath should be located after the catalytic converter..If the first one is mounted lower down on the exhaust manifold, you might not actually see it from the top side as the heat shield gets in the way...

Edited by GearHead
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the one underneath should be located after the catalytic converter..If the first one if mounted lower down on the exhaust manifold, you might not actually see it from the top side as the heat shield gets in the way...

Thanks machan... i'll get it checked ...

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the one underneath should be located after the catalytic converter..If the first one if mounted lower down on the exhaust manifold, you might not actually see it from the top side as the heat shield gets in the way...

Hey guys... this brand new model doesn't have an O2 Sensor... not on the exhaust manifold (i removed the heat shield & checked) anyway ......

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damn! that's bad. having to replace ecu + gb is bit of too much all at one go ney. so i suggest you give one more try with gb issue. why don't you go to that reputed place in seeduwa to check your gb. i don't have his number right now. but i can find it if you want. i have never been there but i saw miniace had recommeded this place and apparently he's specialising in gear boxes alone.

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damn! that's bad. having to replace ecu + gb is bit of too much all at one go ney. so i suggest you give one more try with gb issue. why don't you go to that reputed place in seeduwa to check your gb. i don't have his number right now. but i can find it if you want. i have never been there but i saw miniace had recommeded this place and apparently he's specialising in gear boxes alone.

yeah machan... looking @ a heavy bill...... i did call the seeduwa guy... he said they don't undertake Honda GB's... too much trouble lu.... :) even non CVT ones... i think more than the GB, the fuel injector (duty cycle too long.. bad fuel econ) issue is what i wanna get fixed.......

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yeah machan... looking @ a heavy bill...... i did call the seeduwa guy... he said they don't undertake Honda GB's... too much trouble lu.... :) even non CVT ones... i think more than the GB, the fuel injector (duty cycle too long.. bad fuel econ) issue is what i wanna get fixed.......

i feel for you mate. i have my honda city vtec's stock ecu with me. i wonder whether it will be of any help to you?

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i feel for you mate. i have my honda city vtec's stock ecu with me. i wonder whether it will be of any help to you?

since mine is a non-vtec don't think i'll be able to plug & play... might have to change the distributor.....etc......

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since mine is a non-vtec don't think i'll be able to plug & play... might have to change the distributor.....etc......

chris, i have head a lot of people with civic exi auto cars are worried about the pulling power and fuel consumption.

i doubt whethetr ECU replcemnt would sort out your issues. just my openion.

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chris, i have head a lot of people with civic exi auto cars are worried about the pulling power and fuel consumption.

i doubt whethetr ECU replcemnt would sort out your issues. just my openion.

The fuel econ issue is cos the Injector Pulse width (Open time) is too long..... this can be caused by bad sensors... but scans revealed that all the sensors are good.... tried everything else from spark plugs to injector cleaning....etc.....

looks like the ECU replacement is what's left :) .. so that's where i am right now machan :)

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just a thought,

One of my friends here has a Lancer Evo and he did some mods on it without a proper ECU tune and the car started performing very poorly after the mods. It was boost cutting and the engine was running rough. Then he took the car to a good tuner and found out that ecu was dumping more fuel into the engine than what was required due to all sort of new inputs it was getting through the sensors. According to the tuner ECUs are programmed to do this to protect the engines from issues like lean A/F ratios, etc,etc..

Applying this to your case, just the basic concepts since we are comparing very different cars here, couldn't it be possible that one of your sensors is sending a wrong signal to the ECU which makes it think that there is a higher airflow to the engine that what is actually going into it? Since we all know that ECU can adjust the map, to a certain extent of course, based on the input signals and driving conditions,etc a false signal could lead to an increase in fuel supplied to the engine. Which means that the sensors are working, but the voltage(signal) that its actually sending to the ECU is not the accurate figure..

If this is the case, even a new ECU might not help you to solve the issue. If you have a friend who has an EK3 Exi you could try swapping the sensors with his one and see if that makes an improvement. Agents are very popular for suggesting the most expensive path first as swapping parts is the most profitable, less time consuming and the easiest task for them.

Anyway, this is just a thought, might not really work on your car. But well worth the try.. :)

Also try other forums dedicated for hondas and what sort of kmpl figures are you getting? (Bit lazy to go through the whole thread again to find out):lol:

cheers..

Edited by GearHead
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just a thought,

One of my friends here has a Lancer Evo and he did some mods on it without a proper ECU tune and the car started performing very poorly after the mods. It was boost cutting and the engine was running rough. Then he took the car to a good tuner and found out that ecu was dumping more fuel into the engine than what was required due to all sort of new inputs it was getting through the sensors. According to the tuner ECUs are programmed to do this to protect the engines from issues like lean A/F ratios, etc,etc..

Applying this to your case, just the basic concepts since we are comparing very different cars here, couldn't it be possible that one of your sensors is sending a wrong signal to the ECU which makes it think that there is a higher airflow to the engine that what is actually going into it? Since we all know that ECU can adjust the map, to a certain extent of course, based on the input signals and driving conditions,etc a false signal could lead to an increase in fuel supplied to the engine. Which means that the sensors are working, but the voltage(signal) that its actually sending to the ECU is not the accurate figure..

If this is the case, even a new ECU might not help you to solve the issue. If you have a friend who has an EK3 Exi you could try swapping the sensors with his one and see if that makes an improvement. Agents are very popular for suggesting the most expensive path first as swapping parts is the most profitable, less time consuming and the easiest task for them.

Anyway, this is just a thought, might not really work on your car. But well worth the try.. :)

Also try other forums dedicated for hondas and what sort of kmpl figures are you getting? (Bit lazy to go through the whole thread again to find out):lol:

cheers..

Well mine does abt 7.5 to 8.3km in the city which i think & from what i gathered from other users is way too low for this model since it's made to be fuel econ & not performance (D15Z4 Engine :) nothing much when it comes to power in it)

i wouldn't mind trying out what you recommended.... could you PM the details & how we can proceed .... need to get this fixed & need to get it fixed PROPERLY :)

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biggest problem with sensors is not the fact that they die. but the fact that they don't tell you when they are as good as dead. the sensors not warning that they are as good as dead is a major problem in nissan cars. that is why you hear some fb15s do 10-11km/L whereas the others do 6-7km/L even while no diagnostic check reveals problems.

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Well mine does abt 7.5 to 8.3km in the city which i think & from what i gathered from other users is way too low for this model since it's made to be fuel econ & not performance (D15Z4 Engine :) nothing much when it comes to power in it)

i wouldn't mind trying out what you recommended.... could you PM the details & how we can proceed .... need to get this fixed & need to get it fixed PROPERLY :)

what makes you sure that it is not your faulty gear box that is causing all this havoc? couldn't the gearbox messup ecu thinking? i think yes.

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what makes you sure that it is not your faulty gear box that is causing all this havoc? couldn't the gearbox messup ecu thinking? i think yes.

even @ idle the injector pulse width is too long...releasing way more petrol than what it should....

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Well mine does abt 7.5 to 8.3km in the city which i think & from what i gathered from other users is way too low for this model since it's made to be fuel econ & not performance (D15Z4 Engine :) nothing much when it comes to power in it)

i wouldn't mind trying out what you recommended.... could you PM the details & how we can proceed .... need to get this fixed & need to get it fixed PROPERLY :)

If you are good with spanners you should be able to do this at home :). The only problem is that you'd need to find another Ek3 for that. Alo try changing the injectors as shanX suggested. Most of the mechanics wouldn't actually go down this path as this is extremely time consuming. If you somehow manage to get this done, make sure you reset the ecu every time you change a sensor. You'd also have to drive the car a fair distance in average traffic conditions to get a realistic kmpl figure. As i said this is extremely time consuming. :( What kmpl does it do outstation?

Edited by GearHead
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If you are good with spanners you should be able to do this at home :). The only problem is that you'd need to find another Ek3 for that. Alo try changing the injectors as shanX suggested. Most of the mechanics wouldn't actually go down this path as this is extremely time consuming. If you somehow manage to get this done, make sure you reset the ecu every time you change a sensor. You'd also have to drive the car a fair distance in average traffic conditions to get a realistic kmpl figure. As i said this is extremely time consuming. :( What kmpl does it do outstation?

outstation ... it has done 11 max

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