Short and Long fuel trims

multiecuscan program usage help
Post Reply
D22DJ
Posts: 3
Joined: 09 Jan 2014, 07:23

Short and Long fuel trims

Post by D22DJ » 09 Jan 2014, 07:30

Hello,
i need a little help.
Car is Alfa Romeo 147 Selespeed with ECU Bosch 7.3.1.
I have ELM327 and VagCom interface.
It's possible to read short and long fuel trims with MES?

Can someone with this ECU post screenshot with section for reading of this two parameters?

Thank's

s130
Posts: 941
Joined: 20 Jan 2010, 10:07
Location: Wrexham, North Wales

Re: Short and Long fuel trims

Post by s130 » 09 Jan 2014, 11:14

The following are the only *possible*? fuel trim factors I can see

False Adaptation bank 1 (mul) (FRA Factor 1)
False Adaptation bank 2 (mul) (FRA Factor 2)
False Adaptation bank 1 (add) (DTV Factor 1)
False Adaptation bank 2 (add) (DTV Factor 2)

These supporting description for these is:

"The items show the mixture correction factors the ECU derives based on the various sensor signals in order to keep the mixture ideal throughout the operating range. These factors compensate for the production/wear tolerances in the air flow meter/lambda sensor/injectors when the engine is idling. Two types of correction factors, Multiplicative (FRA) and Additive (DTV) may be used. They are controlled fully by the ECU and are displayed only for reference."
Fiat Strada/Ritmo Abarth 130TC, Barchetta 2005 , 500X Cross Plus

bubu321
Posts: 48
Joined: 25 Mar 2011, 14:50

Re: Short and Long fuel trims

Post by bubu321 » 09 Mar 2014, 11:51

It's possible to read short and long fuel trims with MES?
only Scan XL pro read this parametr.

D22DJ
Posts: 3
Joined: 09 Jan 2014, 07:23

Re: Short and Long fuel trims

Post by D22DJ » 13 Mar 2014, 23:34

i have a succes - torque pro with elm327 bluetooth and android platform, everything OK.

Best regards

Boris
Posts: 49
Joined: 08 May 2010, 17:23
Location: Croatia

Re: Short and Long fuel trims

Post by Boris » 20 Mar 2014, 19:50

Multiplicative (FRA) and Additive (DTV) are long and short term fuel trims.
Don't remember any more exact which one is short which one is long...

Post Reply