im sure someone lent his car to his dad who kicked its head in and he found it a lot perkier when he got it back

 

Yeah Lee that was Micheal haha After a while it went back, then his dad had another go aparently and jumped back to being quicker, strange huh!

I've not had the chance to test it on mine, came disconnected and has been driven with a 'spirited' right foot since back on the road

Yep...that was me!
I honestly couldn't believe the difference...a bit embarassing...I'm 22 he's 55 and he certainly showed me!

 

ha lmao well there is some difference since the battery has been dissconnected

 

Yeah Lee that was Micheal haha After a while it went back, then his dad had another go aparently and jumped back to being quicker, strange huh!

I've not had the chance to test it on mine, came disconnected and has been driven with a 'spirited' right foot since back on the road

 

I might do this to my Z... But that'll be whiping out my style of driving lol

 

Sorry to burst any bubbles, but placebo effect in practice

 

.... and this is based on what evidence?

 

Nope, it's true mate, give it a whirl.

 

Lol... You posted while I was editing

 

Both body spacer and ECU reset are placebo effects.

Why?

Because how ECU works.

ECU adjusts parameters for low/mid-throttle, when it works in closed-loop mode.
Closed-loop mode is when it's working with 14.7:1 air/fuel mixture, aka lambda 1.
In this points it's quite economic, and most important eco friendly.

However, when you floor it, ECU switches in open-loop mode.
In open-loop it does not adjust itself based on O2 sensor, and uses pre-set fuel maps, which are dependent on air intake (on our Civic both MAP and MAF sensors), RPM, IAT (Intake Air Temperature), TPS and similar.
At WOT you want richer mixture, which is dependent on type of car 12.5:1 (for max power), or even richer on some turbo engines for safety reasons. At that mixture O2 sensor is very unreliable anyway, and only one that actually can be used is Wideband one (which most regular cars do not have).

However, in this area there's no 'learning' phase of ECU, so there's nothing to lose/gain with ECU reset.

What you achieve with ECU reset is just for car needing to re-learn part in closed-loop, and mostly noticeable part is at idle.

 

old man of 60

:facepalm:Watch it you young whippersnappers. Old men at 55 and 60 !!!!!!!!!!!
I am 74 and love my civic and keep it immaculate, and give it some welly !

 

:facepalm:Watch it you young whippersnappers. Old men at 55 and 60 !!!!!!!!!!!
I am 74 and love my civic and keep it immaculate, and give it some welly !

LEGEND hope im still fyling around at 74

 

Boyscotty
+1 !!! Me too!

Nick7
-1, You havn't tried either

 

-2...Try it...and then see if you think the same?!

 

Nick.... You are obviously very knowledgeable. Is this how our ecu works specifically for the R18a2 or just in general?

The anicdotal evidence on here and other forums is that the TBS seems show an improvement in the mid range, where as you state, the ecu does make adjustments.

 

Nick.... You are obviously very knowledgeable. Is this how our ecu works specifically for the R18a2 or just in general?

That is in general how ECU works.

I've spent my fair share of time researching how ECU's work, due to turbo-ing my old Civic.
Spent a lot of time examining programs like Uberdata and Crome, and overall that stuff.
Also, my old Civic is now hybrid -> 96+Civic which is OBD2 has OBD1 engine&ECU which required sh*tload off rewiring (basically all connectors are different) to make it all work.

Now, back to topic.. that's how ECU works.
For 'dynamic' part which is low/half throttle it may 'learn' stuff, but that's mainly due to O2 sensor, and being ECO-friendly.
Under WOT, there's no 'learning'. Just reading what sensors say and work accordingly to it.

As for '-1', '-2', ... dudes: I know how some things works, because I researched it. A lot. I do not need to burn my hand in fire to know it's hot.

But, for everyone it's own. If you believe your car is faster with each ECU reset, do it...

 

How about lets agree to disagree...

I know I am not the only one "Benefitted" from this... and it happened when my battery went flat and I had to recharge it..so I KNOW there is a difference when the battery is disconnected!

 

There is a difference!
I just went outside and disconnected my battery, it wouldn't start
But it did when reconnected it! Strange huh ?

No im kidding about that^

But from what i've heard of many people doing this, it makes a small difference... No one is saying "JEEEZ MY CAR IS 50BHP MORE POWERFUL!"

It does reset ECU data. Which backs up what Nick7 says i guess.
If the first lot of data is all complete ECO, it will adapt to it.
If it is all polar opposite, it will see you aren't very ECO
(No one mentioned WOT driving either Flat-out is Flat-out...)


Lets not be having any arguement or rubbish on here, it's all love here !!!
So lets not burst any bubbles either

If people believe it makes mid range difference, let them!! It makes us all smile to hear a nice happy person!! haha
(I Do ^^ hehe)

 

Amen 2 that...
(no comment on Religion or discrimination or argument )

 

:grouphug:

 

But the ECU does recalibrate the sensors.
Careful.... I data logged it

The Audi TT Forum :: View topic - throttle body reset with vagcom
Just 1 example of ECU adaptation ....

 

But the ECU does recalibrate the sensors.
Careful.... I data logged it

The Audi TT Forum :: View topic - throttle body reset with vagcom
Just 1 example of ECU adaptation ....

So were we right or wrong ?

 

For the 2.2
IMO from the way the MAF/MAP and VE are all over the place right after a battery disconnect and the way they group together again over time afterward....with wide open throttle runs....

It would appear that yes....the ECU adapts to the closed loop for finetuning to the environment.
BUT also adapts to the sensors for fine tuning... which includes wide open throttle or open loop if you like, because open loop still depends on sensor feedback like MAP MAF IAT etc.

Of course there is no guarantee the 1.8 ecu behaves the same as the 2.2
Hence the IMO

 

No disrepespect Nick.... the kind of research you done takes ages to work out and put to use.
ECUs have moved on since '96 though :thumbsup:

I'll post datalogs later.
Id do 4 consecutive WOT runs across the full rev range.
Then overloay the results of each run.
Straight after an ECU reset they are all over the place.
After a couple of hundred miles the ovelays cluster together.

In other words hit and miss erratic WOT performance has been converted to consistant WOT performance.

This is I think, what everyone on here is reporting as well.

 

i dont know much about how a acu works but if i drive like a granny and then want to overtake a tracker i wouldnt want my civic to be in eco mode im pritty sure honda wouldnt make a 140bhp car that only runs at full power if you drive it fast everyday of the week!!! i have nothing to back this up but a boyracers civic would be not faster then mine if it was the same civic

 

Hmmm this is interesting. I have had my civic for 2 months almost and it is a second hand car. Initially reading this thread I was hoping that I would be able to improve the performance of the car as it can be a bit sluggish though it seems that the closed loop just helps out with ECO. Which is strange as my economy seems to be poor.

 

You William, our impartial forum friend can be a GENUINE guinea pig!
Why don't you try removing your battery for a few minutes as suggested and then state the difference...IF there is found to be one?

For the good of the community!opcorn::worms:

 

Apart from this battery disconnect thing... Aint there already performance mods for the R18 engine? Don't think I've heard from a 1.8 owner to have said there's any gains... or am I wrong?

 

Look in USA Forums - the USA engine is identical to the Euro model (gearbox is different, as is exhaust, etc.) ...

Lots of performance mods for the 1.8 there - up to and including both Superchargers & Turbochargers (the latter being horribly expensive) ...

 

Below is two pdfs with data logs.
There is 3x charts at the end of each pdf.
Compare them side by side

Postfilter1 is immediately after changing the filter and battery pulled.
Postfilter3 is next day.
Both are 4 consecutive WOT runs overlaid.



opcorn:

 

I might just do that as I need to replace the battery. The battery.looks like the original one that it came out of swindon with... it also has yellow residue on the battery connectors, which according to the manual is a bad sign.

Quick question, when I take the battery out, will everything be wiped? Eg the sat nav, radio stations, car pin that connects to your key?

 

Key mating... no.
Radio presets... maybe.
Clock yea.
Sat.... dont know... aint got it

 

Sat Nav and Radio retain presets