If i purchase on will i need to send it back to aem and have it updated to make it work properly or is it all in the software? Thinking about going this route now.

 

It should have the new firmware. If it doesn't you can download it at the AEM site or I can email it to you. It's real easy to reflash the FIC with the new software. If I can figure it out anybody should be able to.

 

Wat are you using to keep track of your a/f ratios? I am really thinking of getting this. Have you ever done any kind of tuning before you used the f/ic?

 

Any idea if i can safely tune 600cc injectors with it? Whats the highest percentage the f/ic will let you subtract from the fuel pulses?

 

The FIC can add or subtract 100% from the injector pulse length. I had a set of 525CC Neon injectors in for a while and they worked OK.

 

I have an extra set of 630cc so i must cut the fuel trims to 70% for n/a, is that right?
We just need the aem FIC + an wideband sensor + a/f gauge (to be sure everything is running ok)?
That's it?

 

I would start with minus 70%. Check the short term fuel trim with the engine running and warmed up and adjust the FIC fuel correction % to get the trim to zero for NA running.

On my Tib the ECU stays in closed loop during low boost. I had to use the O2 modifier to lower the O2 sensor voltage when there is boost to keep the ECU from pulling the fuel I add during these conditions. Worked out great. The long term fuel trim is 0.7% after two months of daily driving.

 

The 02 signal modifier, is that in the piggy back itself, or is that something added?

 

It is one of the standard functions built into the FIC. At first I didn't use it and the ECU kept pulling fuel with the long term fuel trim. With it hooked it up the fuel trim is staying at 0.7%.

 

Can you pm me the diagram for aem fic ...

 

I second the pming of the diagram. Ordering mine next friday at dealer cost. If i subtract the 71.2% for my 600cc injectors will this allow me to drive the car 20 minutes to the dyno if i stay out of boost or will i need more tuning before i go?

 

larry, i just got my f/ic and myzeitronix wide band. what do you think of putting these item in befor i add injectors and such. i know i will get zero gains but, thinking take it step at a time instead off one big mess to deal with. any hints on install or tuning? thanks

 

My ECU is next to impossible to get to so I extended the harness that comes with the FIC and made all my connections in the engine bay. I had concerns that adding length to the harness might cause problems with the FIC but it works great that way.

Check the firmware version on your FIC, for the TIB ECU it needs the z110.hex, if it doesn't you can download it and reflash your FIC. It's easy to do.

http://forum.aempower.com/forum/index.php/topic,21283.0.html

The download is in the first post at the bottom.


I didn't make any tuning changes for NA running.

At first I didn't use the O2 signal modifier. My ECU stays in closed loop during low boost and it would pull fuel with the fuel trims, which would end up leaning out the open loop tune. Hooked up the O2 modifier and lowered the O2 sensor voltage about 30% as soon as boost came up and the fuel trim zeroed out and the ECU leaves the fuel tune alone.

 

so is it just hook all this up and don't change anything?

 

I would hook it up and make sure it was working and run it with zeroed out maps untill I installed a SC or turbo.

 

So i should not remove the second o2 sensor? On the diagnose software the second o2 gives some strange readings up and down all the time...
I wanted to replace it with an wideband sensor.

 

larryinkc, the O2 modifier, is that the O21+ wire hooked up to the O2 signal wire? would you happen to know what pin that is on the ecu? i started another thread for some one to check my pin numbers but its not going so well. i think the only wires i am missing are switched +12v, two grounds at the ecu, and the sensor grounds at the ecu. thanks for any help!

 

Yes that's the FIC wire that I tapped my O2 sensor signal wire with. It taps the O2 wire after the resistor that you install.

I connected my FIC wires in the engine bay, it was easier than trying to get to the ECU in my car.

 

larryinkc, since you have the FIC, perhaps you can answer a question I have about it. I know that you can retard ignition timing, but can you use the FIC to advance timing? AEMs product description is not very clear on that, I would like to know before I buy it.

 

you can not advance timing with the fic