FIC on Toyota 2009 RAV4 - O2 & VVTi question

[dennis327]

Greeting,

I just fnished the installation on my 09' Toyota RAV4 (NA with no TC), and have some questions below,

1. Before F/IC installed, I change a head exhaust.However, ECU threw CEL of both upstream and downstream O2 sensors. So, we used a "cylinder" to move both O2 sensors outward. But it caused my LTFS around 25%. How can I modify the O2 voltage for both sensors to solve this issue? (wideband for upstream, voltage: 3.27V; narrow for downstream, vlotage: 0.78V). If the O2 modifier in F/IC cannot adjust 2 O2 sensros at the same time, can I hook one of them to Anolog A or B for adjustment?

2. This car was Toyota VVTi engine, can I adjust the VVTi just like VTEC? I just cannot fine related setting in the software. If it is possible, how to do it?


Since I am in Taiwan, AEM is quite new product here. Seems really few tuner know exactly how to fine tune it. Please help~~

[SV]

1. You can use the tapped O2 sensor for the upstream wideband and one of the analog outputs for the downstream one. This means you have to adjust them individually because they are operating at different voltages.

2. At the moment the F/IC cannot adjust the cam timing settings in the VVTi on Toyotas.

[dennis327]

Hi SV,

Many thanks. I tried to setup the O2 table in MAP/Voltage and O2/offset. Result of upstream voltage become ~2.6V and ~0.5V for downstream. However, I did not do the wiring like you said. My tuner seems  just  connected the stock O2 sensors with original O2 input on F/IC. I want to confirm the result I got is okay or not? If this is okay, the next step I will work on is Fuel map~ Then question will be how to know the breakpoint of MAF?



Brs & thanks!



Dennis

[fantola]

You should not move AF sensor outward with O2 sensor spacer. This will affect the accuracy of AF sensor reading which may cause CEL. Also, DTC should be "too lean" whcih mean your STFT reaches upper limit which is 25% on some TOYOTAs. You should use Fuel map to compensate the STFT/LTFT to avoid this issue. As for O2 sensor, you can use the spacer to avoild the CEL with DTC "low catalytic converter efficiency". However, you may try several time to know how much brush wire you need to tap in the spacer.

FYI, there many good tuner who can tune FIC professionally in Taiwan. Also, you can contact the dealer in Taiwan for further information.

Greeting,

I just fnished the installation on my 09' Toyota RAV4 (NA with no TC), and have some questions below,

1. Before F/IC installed, I change a head exhaust.However, ECU threw CEL of both upstream and downstream O2 sensors. So, we used a "cylinder" to move both O2 sensors outward. But it caused my LTFS around 25%. How can I modify the O2 voltage for both sensors to solve this issue? (wideband for upstream, voltage: 3.27V; narrow for downstream, vlotage: 0.78V). If the O2 modifier in F/IC cannot adjust 2 O2 sensros at the same time, can I hook one of them to Anolog A or B for adjustment?

2. This car was Toyota VVTi engine, can I adjust the VVTi just like VTEC? I just cannot fine related setting in the software. If it is possible, how to do it?


Since I am in Taiwan, AEM is quite new product here. Seems really few tuner know exactly how to fine tune it. Please help~~

[dennis327]

Thanks a lot, Angus. I know I should not move the AF sensor outward with spacer, however, if I dont do this, AF sensor will broken due to too high exhaust flow rate.

Do you have any idea for N/A car tuning on F/IC? STFT & LTFT are around 0% when idle right now after I tried to put some data in the F/IC by myself. Next step should be the fuel map....


Dennis