AEM FIC help - Toyota Yaris Forums

shawnitz · 10-03-2020, 01:05 AM

Hi, thank you for the reply!

Yes I have a wideband gauge. I saw your post after search and put the fuel adjustment to 0 between 12 to 15 psia - did not help.

No mater how much I press against the firewall it does not smooth out at all. Completely undriveable unless around 4k rpm when accelerating and even then there is a noticeable hick up - the issues not present with the FIC bypassed.

I did not do any wiring work on this car so not sure about the resistor mod you refer to. Not sure how that would help with stuttering. Going by the data from PC logging, MAF in and out seem good and stable. Also idle is completely fine.

Have made adjustment to the O2 map for getting the part throttle a/f ratio corrected because with closed loop the ECU just ignore any other input in fuel adjustment from FIC.

Long trim is 0-3 in most of the CL area with the FIC plugged in as I used the injector wizard to set the base-map. Without FIC it sits around negative 17-20 in almost all areas. This is all expected and nothing unusual given the larger injectors.

I have a Link G4+ Fury for a different project but the ECU costs more than my Yaris so I would not be installing it. This is supposed to be my daily car and not my project car.

Bought the vehicle with the AEM FIC and tubo kit already installed. Out of the scope of this thread but given the choice I would have went with Greddy Em Ultimate. I have used it before with a different vehicle with great results and found it to be a much better piggyback in every aspect such as capability, logging, tuneability, and ease of use. The only drawback with Greddy is after sale support.

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10-03-2020, 01:05 AM	#3
shawnitz Drives: 2008 Yaris Join Date: Oct 2020 Location: Toronto Posts: 3	Hi, thank you for the reply! Yes I have a wideband gauge. I saw your post after search and put the fuel adjustment to 0 between 12 to 15 psia - did not help. No mater how much I press against the firewall it does not smooth out at all. Completely undriveable unless around 4k rpm when accelerating and even then there is a noticeable hick up - the issues not present with the FIC bypassed. I did not do any wiring work on this car so not sure about the resistor mod you refer to. Not sure how that would help with stuttering. Going by the data from PC logging, MAF in and out seem good and stable. Also idle is completely fine. Have made adjustment to the O2 map for getting the part throttle a/f ratio corrected because with closed loop the ECU just ignore any other input in fuel adjustment from FIC. Long trim is 0-3 in most of the CL area with the FIC plugged in as I used the injector wizard to set the base-map. Without FIC it sits around negative 17-20 in almost all areas. This is all expected and nothing unusual given the larger injectors. I have a Link G4+ Fury for a different project but the ECU costs more than my Yaris so I would not be installing it. This is supposed to be my daily car and not my project car. Bought the vehicle with the AEM FIC and tubo kit already installed. Out of the scope of this thread but given the choice I would have went with Greddy Em Ultimate. I have used it before with a different vehicle with great results and found it to be a much better piggyback in every aspect such as capability, logging, tuneability, and ease of use. The only drawback with Greddy is after sale support.