Intelligent Fuel Trimmer (made by hameed)

[Sharo53]

^^nice effort sir...

but I would say dont give up....make a circuit to fool the ecu"s reading of O2 sensor
and use that along with your this device....

[SER_GTR]

'i' Kicks INN......

As I Said...Pre '00 ECU's Might work But Modern OBD-II Ones Are Just Designed As Intelligent As They Can.....!

They Will Reject Any Changes made and will revert back to their actual .....!!

On Other Side......Who Really Want Performance....D/C The O2 Sensor And See The Magic Happen..... They Simply Blind The ECU To Make Their Moves And Make Thing Run As They Want

[hameeds01]

'i' Kicks INN......

As I Said...Pre '00 ECU's Might work But Modern OBD-II Ones Are Just Designed As Intelligent As They Can.....!

They Will Reject Any Changes made and will revert back to their actual .....!!

On Other Side......Who Really Want Performance....D/C The O2 Sensor And See The Magic Happen..... They Simply Blind The ECU To Make Their Moves And Make Thing Run As They Want

Yup u r right sir

the intelligent ECU nullifies the net result of my Device

have a look @ it
Intelligent Fuel Trimer - Video Dailymotion

Blue ===> Stock ECU Injector O/P signal (IFT input)
Yellow ===> Modified Injector width of my device that drives the injector (IFT output)

Blue LEDs ===> Fuel Injectors Firing

as i increased the width ECU automatically decreased the width in the same proportion based on O2 to cancel out the net effect

x / 2 ----> x * 2 ---> x
x * 2 ----> x / 2 ----> x

[VCheng]

'i' Kicks INN......

As I Said...Pre '00 ECU's Might work But Modern OBD-II Ones Are Just Designed As Intelligent As They Can.....!

They Will Reject Any Changes made and will revert back to their actual .....!!

On Other Side......Who Really Want Performance....D/C The O2 Sensor And See The Magic Happen..... They Simply Blind The ECU To Make Their Moves And Make Thing Run As They Want

Disconnecting the O2 sensor(s) will make the ECU default to open loop operation, which runs a little rich. Remove the air filter too and the engine will produce some more power at the expense of economy.

[SER_GTR]

Disconnecting the O2 sensor(s) will make the ECU default to open loop operation, which runs a little rich. Remove the air filter too and the engine will produce some more power at the expense of economy.

This Is OLD Skool Way Of Dealing With STUBBORN Son ********************** LOL......As i Said.....Who Really Want Performance...They Do Their Own Stuff And Never Mind A CEL On Their Cluster

But A Proper Monitoring Of AFR's Are Always Needed And Wideband Is Your best friend in this regards.....

[SER_GTR]

Yup u r right sir

the intelligent ECU nullifies the net result of my Device

have a look @ it
Intelligent Fuel Trimer - Video Dailymotion

Blue ===> Stock ECU Injector O/P signal (IFT input)
Yellow ===> Modified Injector width of my device that drives the injector (IFT output)

Blue LEDs ===> Fuel Injectors Firing

as i increased the width ECU automatically decreased the width in the same proportion based on O2 to cancel out the net effect

x / 2 ----> x * 2 ---> x
x * 2 ----> x / 2 ----> x

Its Not Only Your Device Dude.......Even SAFC/AFC/VAFC Fails In Most Places.....

(my 98 4AGE ECU Rejects The Hell Out Of Them After Somedays And Revert Back To Its MAPS Unless You Play Real GOOD With It.....)

[hameeds01]

^^nice effort sir...

but I would say dont give up....make a circuit to fool the ecu"s reading of O2 sensor
and use that along with your this device....

“I have not failed. I've just found 10,000 ways that won't work.”

“Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time.”

“Many of life's failures are people who did not realize how close they were to success when they gave up.”

Thomas A. Edison

[hameeds01]

@ SER_GTR & VCheng

sir what u think will it work in low class Paksuzuki so called EFI vehicles like Euro II (Mehran, Bolan, Ravi, Cultus) ??

[VCheng]

@ SER_GTR & VCheng

sir what u think will it work in low class Paksuzuki so called EFI vehicles like Euro II (Mehran, Bolan, Ravi, Cultus) ??

Compliance with Euro II standards requires systems identical to the US OBD2 system, just with different legal limits allowed for emissions.

[UltimateEconomyGroup]

Sarkar if u r interested in my IFT stuff then lets have a deal, i will provide u a complete ckt diagram + parts list + Source Code Hex + Compact sized PCB gerber files. what u say??

ok I am interested in it but you should be the part of the whole project I will provide the car's and finance the whole project you will just write the hex file's and we can lean an jdm OBD 2 vehicle. what you say

[UltimateEconomyGroup]

@ SER_GTR & VCheng

sir what u think will it work in low class Paksuzuki so called EFI vehicles like Euro II (Mehran, Bolan, Ravi, Cultus) ??

IT WILL ALSO WORK ON THE PKDM tOYOTA'S AND HONDA'S AND SUZUKI'S I ALREADY DID THAT I AM WILLING TO SHARE MY EXPERINCE WITH YOU WHAT DO YOU SAY. A JOINT PROJECT WHAT YOU SAY

[uetian04]

So this is no more remained intelligent because it could not performed its task.

Suggestion.
Now post subject should be.
STOCK ECU NULLIFIES HOME MADE FUEL TRIMMER INTELLIGENCE

due to end result.

Any way, you have gained much experience from this,
That's ultimate result.

[Xulfiqar]

any modern obdii compliant ECU- even old ones that used oxygen sensors have short and long term fuel trim, they alter the trim on the fly depending on the reading that they recieve from the O2 sensor and MAF etc...

if you trim out the injector duty cycle, it will cause constant updating of the short term trim in positive (due to lean out) and hence register a positive long term value too, The first task the ECU does is to take care of emmissions and to do that it needs to provide a precise air fuel ratio at all times.

modern cars with AF sensors instead of O2 sensors are even more quick in adjustment on the fly.

This item may work well in very early fuel injection systems.

[hameeds01]

So this is no more remained intelligent because it could not performed its task.

Suggestion.
Now post subject should be.
STOCK ECU NULLIFIES HOME MADE FUEL TRIMMER INTELLIGENCE

due to end result.

Any way, you have gained much experience from this,
That's ultimate result.

“I have not failed. I've just found 10,000 ways that won't work.”

“Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time.”

“Many of life's failures are people who did not realize how close they were to success when they gave up.”

Thomas A. Edison

[hameeds01]

any modern obdii compliant ECU- even old ones that used oxygen sensors have short and long term fuel trim, they alter the trim on the fly depending on the reading that they recieve from the O2 sensor and MAF etc...

if you trim out the injector duty cycle, it will cause constant updating of the short term trim in positive (due to lean out) and hence register a positive long term value too, The first task the ECU does is to take care of emmissions and to do that it needs to provide a precise air fuel ratio at all times.

modern cars with AF sensors instead of O2 sensors are even more quick in adjustment on the fly.

This item may work well in very early fuel injection systems.

in SANTRO there is no O2 sensor bt such cars r very rare

Sir have a look @ it
Intelligent Fuel Trimer - Video Dailymotion

Blue ===> Stock ECU Injector O/P signal (IFT input)
Yellow ===> Modified Injector width of my device that drives the fuel injector (IFT output)

Blue LEDs ===> Fuel Injectors Firing

as i increased the injector width ECU automatically decreased the width in the same proportion based on O2 to cancel out the net effect.

“I have not failed. I've just found 10,000 ways that won't work.”
Thomas A. Edison

[SpoonMotorSports]

Disable the oxygen sesnor only then it will work

[VCheng]

Disable the oxygen sesnor only then it will work

Disabling the O2 sensor will send the ECU into forced open-loop mode and set an error code.

[SpoonMotorSports]

Disabling the O2 sensor will send the ECU into forced open-loop mode and set an error code.

how will the ecu give o2 code when you have disabled it lol

[VCheng]

how will the ecu give o2 code when you have disabled it lol

The laugh is on you Sir. Your statement above shows you really have no idea how modern engine controls work.
@xulfiqar I mention you here since I suspect you will enjoy the comment made above.

[SpoonMotorSports]

@vcheng i tune cars so I know how things work if you disable the o2 from the ecu only then you can tune the closed loop otherwise the ecu will revert back to the stoichiometric value it is set to..I am sorry but I guess you misunderstood my post I never said to remove o2 I said to disable o2 from the rom/code