ECMlink First time tuning, do I need bigger injectors?

[brandino13]

First time posting so bare with me.

I decided to tune my car myself as no shop around me is familiar with ECMLink and I'm not buying Haltech. I've watched a lot of videos and have done a lot of research (even have a notebook) but I'm still struggling. My build list is on my profile and I am running I think a stock MAF (injen intake).

First issue is my AEM afr wideband. I don't know if its in the front or rear 02 as they both look the same. (picture below)

Second is my combinedft stays at 16.8 once it goes into closed loop and my ISC position is really high when the car is started (80s) and then will go to 30-40 until closed loop kicks in and it'll slowly drop to 0 but I shut it off before that because the AFRs start rising.

I'll post a log here. I just want to drive the car I'm not looking to try and make more power yet as I want to get way more familiar with ECMLink and convert to speed density. I do have 1200cc FIC hi rez injectors from ECMTuning's website to go in but I had a problem installing them and decided to just tune it on the stock ones first. t

Thanks for the help in advance and sorry for being a newbie in 2023 .

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[pauleyman]

If your mod list is correct you are wasting your time tuning on stock injectors. I find a huge red flag that you said "I think it's a stock maf".
You need to know 100% what you do or do not have. Post pictures. Ask questions but I would not proceed without 100% objetive answers to questions etc. What do you have and how to proceed. That sounds like where I would start. What problems did you have with injectors?

one more thing. That is not front and rear o2 position. Front refers to up front by the turbo/manifold. Rear o2 is several feet down the exhaust after the catalytic converter. It appears somebody has welded in a separate bung for a wideband.

 

[Justin DuBois]

Your ECM link config is set to wide band on both the front and rear input. You need to know which input the widband is using. This may require you to inspect the ecu harness wiring to see which pin the widband is plugged into. There are other ways by inspecting the live log, but as you are new to ECM Link, that might be harder to figure out. See where your wires go.

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And... What's with the downpipe gasket? Why is there a bolt hole ear poking out the side like that?

 

[ScrubyMcBubble]

The FIC 1200 Hi-Z injectors straight from ECMLink website DO fit the stock fuel rail and injector wires (don't forget to delete the resistor pack). The electrical connectors connect up to the stock injector wires too. One thing to keep in mind, the connectors sit higher on the injector which results in them hitting the head of the engine if you orient them with the electrical connector facing the engine. All you need to do is rotate them a little to the side to avoid this. On mine I had all injectors rotated 45° to the left with only the 1st injector closest to the timing belt at 45° to the right instead due to the fuel rail mount.

Another option you could consider if you don't trust your MAF sensor.. install a GM IAT and a MAP sensor into the intake or throttle body elbow then try tuning it as a speed density setup. Before proceeding with the tune you should also make sure that either your OEM O2 sensors are working or that ECMlink can see your aftermarket one and is set to use it to simulate front O2 sensor. Hard to tune an AFR without fully trusting the accuracy of the sensors that tell you the AFR.

 

[brandino13]

If your mod list is correct you are wasting your time tuning on stock injectors. I find a huge red flag that you said "I think it's a stock maf".
You need to know 100% what you do or do not have. Post pictures. Ask questions but I would not proceed without 100% objetive answers to questions etc. What do you have and how to proceed. That sounds like where I would start. What problems did you have with injectors?

one more thing. That is not front and rear o2 position. Front refers to up front by the turbo/manifold. Rear o2 is several feet down the exhaust after the catalytic converter. It appears somebody has welded in a separate bung for a wideband.

it is the stock maf my bad. and my 1200cc were spraying externally. idk if i had them seated wrong or what but three different tries and they just keep spraying everywhere (atleast one of them) and my o rings are fine. figured id tune it on stock injectors first to learn but ig im just wasting my time? also how can i tell which o2 is bad? and how do i correctly log my aem wideband guage? its greyed out for me right now on link. also yes i know i didnt have the proper gasket so i just put one in that fits for the time being

 

[pauleyman]

it is the stock maf my bad. and my 1200cc were spraying externally. idk if i had them seated wrong or what but three different tries and they just keep spraying everywhere (atleast one of them) and my o rings are fine. figured id tune it on stock injectors first to learn but ig im just wasting my time? also how can i tell which o2 is bad? and how do i correctly log my aem wideband guage? its greyed out for me right now on link. also yes i know i didnt have the proper gasket so i just put one in that fits for the time being

did you have the bottom insulators in place also? Stock fuel rail? As stated above you will have to find out where the wires go and how the wideband is wired in. Yes you are wasting your time tuning stock injectors. You can't do anything with them as they do no flow enough for the mods you have. You will be out of fuel before you even get into the powerband very far.

 

[brandino13]

did you have the bottom insulators in place also? Stock fuel rail? As stated above you will have to find out where the wires go and how the wideband is wired in. Yes you are wasting your time tuning stock injectors. You can't do anything with them as they do no flow enough for the mods you have. You will be out of fuel before you even get into the powerband very far.

bottom insulators are there. and yes stock fuel rail. was thinking maybe i need spacers? it sprays from the middle of the injectors.

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[ScrubyMcBubble]

Oh boy, what a coincidence.. I happen to have a thread on a similar issue with my FIC 1200cc's

https://www.dsmtuners.com/threads/leaking-boost-in-middle-of-fic-injector.543747

Is yours leaking fuel from that seam? Because that would be different than my situation whereas I only have air/boost pressure leaking on that seam.

The top of these injectors with the logo is actually just a height adapter that you can pop off easily. Under the height adapter there is an O ring, if this O ring is contaminated or damaged then it would let fuel past it. As they are brand new FIC might replace them under the lifetime warranty for you. Sometimes they will even ship you the O rings needed. In my case they shipped me a whole new set of 4 when I showed them video evidence of my air leak which is unrelated to the O ring that holds back the fuel.

 

[brandino13]

Oh boy, what a coincidence.. I happen to have a thread on a similar issue with my FIC 1200cc's

https://www.dsmtuners.com/threads/leaking-boost-in-middle-of-fic-injector.543747

Is yours leaking fuel from that seam? Because that would be different than my situation whereas I only have air/boost pressure leaking on that seam.

The top of these injectors with the logo is actually just a height adapter that you can pop off easily. Under the height adapter there is an O ring, if this O ring is contaminated or damaged then it would let fuel past it. As they are brand new FIC might replace them under the lifetime warranty for you. Sometimes they will even ship you the O rings needed. In my case they shipped me a whole new set of 4 when I showed them video evidence of my air leak which is unrelated to the O ring that holds back the fuel.

i was missing the spacers. got it fixed now.

 

[brandino13]

The ISC position was working at one point in ECMLink but now its greyed out. I've tried deleting it from stream and captured values and adding it back but its still greyed out.

I haven't tried starting the car yet because I just put bigger injectors in today and wanted to tune it but for whatever reason the ISCposition is greyed out.

Also if my AEM WB is welded in a seperate bung upfront (see picture) how do I log or set that up in ECMLink? Is it okay to just remove the one under the seat? Getting bigger exhaust so was wondering if it was important to get a bung welded.

Yes I see gasket. I just needed a temporary one that fit.

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[steve]

The ISC position was working at one point in ECMLink but now its greyed out. I've tried deleting it from stream and captured values and adding it back but its still greyed out.

I haven't tried starting the car yet because I just put bigger injectors in today and wanted to tune it but for whatever reason the ISCposition is greyed out.

If it's greyed out it's because you're not capturing it in the log. Try adding it using F10 before starting to log.

ecmlink101datalogging [ECMTuning - wiki]

www.ecmtuning.com

Also if my AEM WB is welded in a seperate bung upfront (see picture) how do I log or set that up in ECMLink? Is it okay to just remove the one under the seat? Getting bigger exhaust so was wondering if it was important to get a bung welded.

As mentioned before you need to investigate how/where the AEM is connected to the ECU. Then you can configure it and get useful info in the log. It might not be currently connected and if it's not you may want to connect it in place of the rear O2.

widebandbasics [ECMTuning - wiki]

www.ecmtuning.com

aemwb [ECMTuning - wiki]

www.ecmtuning.com

 

[brandino13]

If it's greyed out it's because you're not capturing it in the log. Try adding it using F10 before starting to log.

ecmlink101datalogging [ECMTuning - wiki]

www.ecmtuning.com

As mentioned before you need to investigate how/where the AEM is connected to the ECU. Then you can configure it and get useful info in the log. It might not be currently connected and if it's not you may want to connect it in place of the rear O2.

widebandbasics [ECMTuning - wiki]

www.ecmtuning.com

aemwb [ECMTuning - wiki]

www.ecmtuning.com

why the rear o2? couldnt i just swap the aem to the stock location and put that one in the custom bung and leave it unplugged? also it is being captured and its still greyed out. it was working before

 

[steve]

Because the front OEM narrowband is more reliable than most AEM WB's and the ECU still wants NB O2 feedback for closed loop.