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ECMlink Closed loop idle..need help

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nice97civic

Supporting Member
343
18
Jan 29, 2004
lancaster, Pennsylvania
For whatever reason, the car is HORRIBLE in closed loop. Once the car switches over to open loop, the car is normal. I must be missing something pretty simple but I'm not sure what it is since the ecu should be making its own adjustments in closed loop, correct?

Mods are, 20g, evo 560cc, small cam, intake, exhaust, walbro 190.
 
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Oh i saw idle, so its not idle issue so thats something else no related to have running for a while. So i would call it driveability issue, or not able to drive. With that being said it could be a host of things, what have you done? Have done anything as far as looking at everything?
 
Yea I can change the title, I just wasn't sure how to describe it. There are no boost/vacuum leaks, etc. The car drives absolutely flawlessly once it idles for a few minutes. One thing to note, this only started after I switched from black box ecu running ecuflash to my eprom ecu with ecmlink.
 
Very possible. Wondering why that would be though. ECMLink is setup for my injector size, AFR table is solid and once the car has time to "think", it runs just fine. Not sure what the lag between starting the car and being able to drive it normally is
 
Could be the dsm gremlins that face us, it happens to us one time or another, thats when we have to dig deeper for our aging platforms.
 
before you roast my fuel trims. I'm aware they're way off however when I adjust them, the car dies so something else is off elsewhere I assume but right now I don't know where.
 
LOL Going to need more info than that. Stock MAF? No afpr?

1. Fill out your profile page with list of ALL mods. For now is this all? 20g, evo 560cc, small cam, intake, exhaust, walbro 190
2. Capture & Log ISC position, Battery, WB Factor, ecuboost
3. Zero out your fuel slider
4. Uncheck both boxes in MAF Clamp
5. Under Dash - set your knock cel to 2*
6. Under ECU input - MAP should be undefined or MDP. I'm not sure about this since it's a 2g but I'd say undefined
7. Grab a cruise & idle log after car gets up to temp.

Do you have ecmlink pw & login? I highly recommend watching their demo videos. You can tune idle and cruise on your own. Then tune WOT. It’s a maf car so it shouldn’t take you long before it’s running right
 
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Sorry I just sent a log of the closed loop nonsense :tease:. I'll throw up another cruise log soon. I'll go change those parameters as well. I do have an ecmlink login.

I'll fill out my profile with mods LOL.
 
heres a quick log from today. keep in mind I forced open loop for this cruise and then turned that off so you'll see it switch to closed loop and go stark lean towards the end. I attached another one from 2.14 that has longer closed loop duration.

Log today has fuel sliders at 0, maf clamp unchecked, etc as noted above
 

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  • log.2021.02.17-04.elg
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  • log.2021.02.14-04.elg
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You have to log and capture wbFactor. Since we don't have the same WB, I can't see your AFR's. You haven't zero'd your fuel slider, and you changed the global to Zero, it should be -18%. Load this, let it get up to temp 180* and start logging. I noticed your front O2 isn't moving but this could be from just needing to be tuned. Do you still have stock egr set up?
 

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  • settings.2021.02.17-02.ecm
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I don't believe there is a blockoff on there, but i'll have to double check. Forgive me, mods done by previous owner and he didn't run it very long in it's current state. Yay.
 
Where should I see wbFactor? I don't see it as a value I can capture.

MAF is correct

It should be there.
Go to Edit
Captured value - if you don’t see it, it could already be there. If so, go to Displayed Value.
 
Sorry there are so many here. The first four were just me checking temps but you can see in closed loop its a train wreck then once it switches to open loop things mellow out.

Maybe its called OldAFRatioEst now?
 

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  • log.2021.02.17-06.elg
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  • log.2021.02.17-08.elg
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  • log.2021.02.17-10.elg
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Your front O2 isn't moving. I suspect that's why it runs like crap.
Move the 0 & 50hz sliders under MAF comp until the airflowperrev is .25ish. Once that is done, look at your combinedFT. If it's positive, add deadtime to get combinedFT close to zero. Post a log when that's done.
 
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