Technical Throttle adaptation

[Olliver]

Hello,

I have a question, if I change the electric throttle-body of my 500 1.2 Euro5, will it be re-adapted after automatically? Or this there a special procedure necessary for re-adaptation? Or can it be done only by the dealer with a special test-tool??
Thanks.

 

[portland_bill]

eLEARN the official workshop manual for the Panda just describes remove and refit, no mention of any need to reset. MultiECUScan also shows no reset function.
It would appear that a straight remove and refit is fine. The ECU will adjust based on results, as measured by the lambda sensors.

But why do you think you need a new one?

 

[Olliver]

No I don´t think I need a new one, but I have one of a Grande Punto 1.4 8V, that is similar to the 500 1.2 one, but the diameter of the flap is bigger.
Leads to approx. 15% bigger area.

 

[The Twins]

Don't assume the bigger area will give you more power / performance as the larger amature my lead to decreased air speed / flow / intake. It used to be the same issue with the old Webber DCOE carbs. Folk would assume that fitting 45's in place of 40's would give better performance but it wasn't the case unless the engine was big enough to need the bigger carbs.

 

[Olliver]

I don´t assume a big power increase as I hope that the Fiat engineers have calculated the throttle in that way that full open throttle means no throttling.
But I assume a better response of the engine, same like pedal tuning.
And in a MPI engine the air velocity at the throttle isn´t important at all, because the injection valves are located at the end of the intake manifold ports and not at the throttle. The port diameter is influencing the velocity there and not the throttle diameter. And even there it is not that critical, because compared to a carburetor the fuel is active injected and not "sucked out". So you have always a throtteling effect with a carb, because prior to the throttle valve you find the venturi whose diameter is smaller than that of the throttle.
Thats the main adavantage of a fuel injection system.

 

[Olliver]

Hi guys,

I´m running with the bigger throttle now nearly for 3 years without any problems. Now I made the same mod on a friend´s 1.2l Euro 6 (2015) engine, but here it didn´t work in contrast to my engine were it was running from the first key on.

I thinks it´s an adaptation problem.


I have found somthing on youtube for a Grande Punto with same engine, but it´s in italian, and I don´t speak....

[ame]https://youtu.be/v-A9C5KoUeA[/ame]

Some help?

 

[NoNameYet]

I have come across this old thread while searching for information due to having the same issue like Olliver is having on a Euro 6B 1.2L In my case the engine starts with the 44 mm throttle body but there is no response to the throttle pedal after only a few seconds. Have tried the learn procedure with MES but still getting the errors:

P1121-62 - Throttle potentiometers coherence - Signal compare failure
P1687-94 - Motorised throttle (stop learn) - Unexpected operation

I have watched the video posted by Olliver and I will try this procedure as soon as I have some time available again. In the meantime I will translate it from Italian.

()

Here it goes:

Procedure for auto adaptation of the electronics for injection:

- Key in OFF position
- Deactivate all consumers (Radio, Air Con, etc)
- Do not press the throttle pedal
- Switch on key to ON (Do not start the engine), wait 30 seconds
- Switch key to OFF, wait 30 seconds
- Repeat this procedure
- Start the engine and leave to idle

 

[dbotsios]

I have come across this old thread while searching for information due to having the same issue like Olliver is having on a Euro 6B 1.2L In my case the engine starts with the 44 mm throttle body but there is no response to the throttle pedal after only a few seconds. Have tried the learn procedure with MES but still getting the errors:

P1121-62 - Throttle potentiometers coherence - Signal compare failure
P1687-94 - Motorised throttle (stop learn) - Unexpected operation

I have watched the video posted by Olliver and I will try this procedure as soon as I have some time available again. In the meantime I will translate it from Italian.

()

Here it goes:

Procedure for auto adaptation of the electronics for injection:

- Key in OFF position
- Deactivate all consumers (Radio, Air Con, etc)
- Do not press the throttle pedal
- Switch on key to ON (Do not start the engine), wait 30 seconds
- Switch key to OFF, wait 30 seconds
- Repeat this procedure
- Start the engine and leave to idle

Hi
I have exactly the same issue. Slow response of my throttle when car is in incline and engine almost stalls. Did you manage to solve this?