Adjusting Target AFR | Tech Tuesdays | EP12

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Depending on your engine build, whether it's a mild build or an aggressive build, you may want to change how rich or lean the engine is running. Today we are going to talk about that and show you how to adjust target AFRs on FiTech's Tech Tuesday!
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Опубликовано:

9 сен 2024

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Комментарии : 48

@damianvelezgonzalez8557 3 года назад

Thank you for taking the time to answer my questions.

@FiTechEFImedia 3 года назад

Anytime!

@frankie4speed818 3 года назад

So, I've only adjusted a few times but have noticed that my throttle gets stuck in the closed position. I would have to firmly press the gas pedal to get it to loosen up, but would make the truck jump a tad. I've disconnected all linkages to the efi unit to troubleshoot, and it's confirmed that it is the unit getting stuck. Any solutions or suggestions?

@isawul00k 2 года назад

Adjust the throttle blade. Turn the throttle blade screw clockwise. Adjust IAC

@whurst630 3 года назад

I will be spinning my engine 7200-7500rpm. If I use the WOT 6000 rpm point. Above 6000 rpm will the unit continue to target lower AFR. For example if I set target after to 12.7 @ 6000 will it continue on and target say low 12s at 7000+ RPM?

@isawul00k 2 года назад

Why won't they answer this question?

@averycorwin1139 Год назад

I have a brand new 400 HP system on my customers truck and the afr's will not write to the ECU it keeps going back to the factory settings I've tried to call fitech but of course they're at lunch so I can't talk to anybody if they're going to serve internationally they need to have people on the phone tech line at all hours

@MrIstanbulTurkey 10 месяцев назад

Thank you for uploading these informational videos. I would like to ask you if I chance the AFR values is it enough to be richer when I changed the exhaust system. Or should I also add fuel on F tables on cylinder? Regards

@fatjaysgarage 2 года назад

Awesome content man

@FiTechEFImedia 2 года назад

Thanks!

@huwjones2056 2 года назад

How do you adjust the afr limit in pro tuning? I need to run leaner than 14.7 at low revs and low load.

@stuffle69 Год назад

Where do you get scan tool to adjust the afr?

@cyrusvirus6928 10 месяцев назад

what increments do we adjust the afr?

@richardmathern900 Год назад

At what elevation are we talking about? I am at 6k

@diddyvisionz1626 2 года назад

I need help tuning my Fitech system please help before I scrap it no one noes how to tune them tht I know

@FiTechEFImedia 2 года назад

Hello, have you used our distributors and installers tool to help you find a local installer near you? fitechefi.com/distributors-installers/

@earlporch7486 2 года назад

What should the AFR Trims for driver and passenger be while cruising I have a 5.3l ls with aftermarket comp cam

@FiTechEFImedia 2 года назад

There is no exact answer to this. You should expect them to be +-10 most of the time but you can see more sometimes when the system is still learning.

@jasonlanders7337 2 года назад

Can this hand held unit be purchased separately?

@cyrusvirus6928 10 месяцев назад

your fitech should’ve came with one

@txrtuga4498 3 года назад

And what if we have 40kpa do the same settings still apply on the computer?

@FiTechEFImedia 3 года назад

Yes they do.

@damianvelezgonzalez8557 3 года назад

Good morning, I have an LS 5.3 engine with Hooker system for a 1 turbo with a Fuel injection ultimate LS system, it is advisable to mount the two Wide Band and where in case it is one where it would be better

@FiTechEFImedia 3 года назад

If you are running a single turbo we would recommend using a single oxygen sensor in the downpipe of the turbo.

@ss0073 3 года назад

I’m confused by the 1100 RPM adjustment at WOT and boost. My idle is at 900 RPM, 3000 RPM on the brake, therefore it’s technically never seeing the 1100 AFR correct? I’m not even seeing boost till around 2500RPMs as well. I feel like the AFR at 1100 is a mute point at WOT and boost. Am I right or wrong?

@FiTechEFImedia 3 года назад

You are correct. The plot point is there but if your engine will not replicate the RPM/boost level the cell will never be used.

@ss0073 3 года назад

@@FiTechEFImedia Great! Thanks for confirming

@perryg5500 2 года назад

My unit has 45, 75 and 95. What is the 75 for?

@FiTechEFImedia 2 года назад

75 kpa would be an example of a mid throttle position in most cases. The 45, 75, 95 are kpa readings which are how the system sees the engine load.

@user-oe4xd3pm1y 3 месяца назад

How

@isawul00k 2 года назад

Why can't the boost kpa be set lower. Anything above 100kpa is gonna be boost...

@FiTechEFImedia 2 года назад

The boost kpa is for boost. Therefore the value will be higher than 100kpa.

@isawul00k 2 года назад

@@FiTechEFImedia thanks for replying. So when I'm making anything over my base map kpa of 102.5 it will run the boost kpa afr? It's been jumping around with little fat spots

@garycasteel5387 3 года назад

I have the 600hp go street kit on a 454 big block can I run e85 in that

@FiTechEFImedia 3 года назад

Yes you can!

@garycasteel5387 3 года назад

How do you tune for e85

@railroado1238 3 года назад

I have a 355 Sbc with a cam in it. It seems to run rich at idle. What would you believe my target afr should be. It’s on 14.5 I believe

@FiTechEFImedia 3 года назад

@@garycasteel5387 Increase the CID of the engine by 30% on the handheld. Be aware that the HP rating drops when using E85. The kit will then support 420 HP.

@FiTechEFImedia 3 года назад

@@railroado1238 You could have an exhaust leak.... If this cam is really big and has a lot of valve overlap you can target even leaner AFR's.

@chrisurfer83 3 года назад

Need as many tuning videos as possible. My CJ 7 is running so rich it's ruining oil and plugs

@FiTechEFImedia 3 года назад

Make sure to check fault codes, we cover that in this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3nMESN_uW38.html in the time stamp 4:01 Also check your fuel pressure: Covered here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VCa3iWgMW88.html

@chrisurfer83 3 года назад

Thanks, these don't seem to be the issue. I was on your tech line for a couple hours Thursday. We tested just about everything including rpm noise and fuel pressure (44psi). I really appreciated his help, very patient!

@chrisurfer83 3 года назад

I'm going to embarrass myself a bit here ... It was out of gas ...

@FiTechEFImedia 3 года назад

@@chrisurfer83 you would be surprised how often that happens, glad to hear it's all good now!

@chrisurfer83 3 года назад

@@FiTechEFImedia haha yeah, had enough to get fuel pressure but not enough to run lol