ECMlink ECMLink not reading things I’m logging

[Zanaqqq]

Okay so last night all my values were reading and my car was running okay. Now half my values I log don’t read anymore and car is running bad. I’ve uploaded a picture of a log where the car was running. I’m running speed density on a GM IAT with AEM wideband

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[Justin DuBois]

Can you upload a log here in this thread. You can attach an .elg file same as you attach a picture.
Your airflow is reading 0 at 1926 rpm? Thats weird.
If you have a wideband connected - its not on the display.

 

[Zanaqqq]

Can you upload a log here in this thread. You can attach an .elg file same as you attach a picture.
Your airflow is reading 0 at 1926 rpm? Thats weird.
If you have a wideband connected - its not on the display.

heres the log

I also did reset the ecu because my car was not starting so could that be affecting it? If so how can I fix them reading again?

 

[steve]

Try fixing the ECU Inputs

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[Zanaqqq]

Try fixing the ECU Inputs

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That’s the weird part. In my end their set to aemband and GM IAT

They do read for a tiny second when the car first starts

Also I did reset ecu earlier and now there not working.

 

[Justin DuBois]

That’s the weird part. In my end there set to aemband and gm iat

Hmm - If it were me, I would Screen shot the ECU inputs tab now (to record a visual copy of setup) , then un-configure the sensors - "Copy to ECU" - then reconfigure the sensors, and "Copy to ECU" again. I don't know for sure it will fix your situation, but this should re-write the chip.

 

[Zanaqqq]

Okay, so last night I had it running pretty good and then this morning it wouldn’t start at all. So I reset the ECU doing the pedal method. Since then none of my logged valves that would normally read are no longer reading. I’m running speed density, GM IAT, AEM wideband, I think it’s got a GM 3 bar MAP, e85, 1200cc injectors, full build on the car is on my profile.

I need help figuring out how to fix it so my stuff reads again, my log I have is below.

Also I know it says in ECU input that stuff is stock I changed that already but didn’t get a updated log so I know that’s not right but everything acted the same either way.

updated with car running log below. help me please

 

[Zanaqqq]

Hmm - If it were me, I would Screen shot the ECU inpus tab now (to record a visual copy of setup) , then un-configure the sensors - "Copy to ECU" - then reconfigure the sensors, and "Copy to ECU" again. I don't know for sure it will fix your situation, but this should re-write the chip.

How do I do that?

 

[Justin DuBois]

How do I do that?

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Without the engine running, make a connection to the ecu, go to ecu configure and select thr inputs tab, as seen above. Configure the inputs back to Factory/none and then click the copy to ecu button at the bottom right in the window.

After the progress bar completes reprogramming the chip - change the Factory/none setting back to how it was, with the iat, map, and wideband configured, then click “copy to ecu” button again.

 

[Zanaqqq]

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Ahhh, I did do that and makes no difference. The afr will read for like a second and then zero out. Fuel trims don’t read at all still

 

[Justin DuBois]

Ahhh, I did do that and makes no difference. The afr will read for like a second and then zero out. Fuel trims don’t read at all still

In the original post - “last night” it was working and now it is not - what was the last work you did on the car? Did you finish wiring a sensor or anything connecting to the ecu?

 

[Zanaqqq]

In the original post - “last night” it was working and now it is not - what was the last work you did on the car? Did you finish wiring a sensor or anything connecting to the ecu?

I did nothing, I did reset the ecu though which may have caused it

 

[Justin DuBois]

I did nothing, I did reset the ecu though which may have caused it

Likely the reset introduced the current behavior, and now its stuck. If it was me, I’d look at the ECM link documentation on how to reset and see if there are any clues, like firmware version. maybe a reset put it back to something too old for your version of software? (guessing) no idea. If you get nowhere, consider sending the ecu in for diagnostics.

 

[Zanaqqq]

Likely the reset introduced the current behavior, and now its stuck. If it was me, I’d look at the ECM link documentation on how to reset and see if there are any clues, like firmware version. maybe a reset put it back to something too old for your version of software? (guessing) no idea. If you get nowhere, consider sending the ecu in for diagnostics.

That’s my thought, I updated the firmware version last night. It was on 3.24 before updating it. I finally got it to read afr and airflow. I need a new wideband and once I do that I’ll see what happens. Thanks for all the help so far

 

[Zanaqqq]

Okay so I have a Omni 4 bar MAP with a GM IAT. I think I still have stock O2 sensor so no wideband.

One ECMLink with MAF type on stock the car idles good at 900-1000 like normal, when I switch to speed density the idle surges from like 1000-1800 and my fuel trims go from 0% to 5.1% back and forth.

Also when starting the car on stock MAF setting the car starts and idles right away, and when it’s on speed density and starts it shoots up to 2800-3200 when it first starts then drops to 1000 and starts purging

I can upload a log if anyone wants. Just wondering what could be causing it

 

[steve]

While you have those sensors installed has you fixed your ECU to use them?
Do you sill have a MAF installed or are you just switching DSMLink for one to the other and effectively running in limp mode when switched to stock MAF?

It would help if you kept your various tuning issues in one thread until you clearly resolve them and update us.

 

[Zanaqqq]

While you have those sensors installed has you fixed your ECU to use them?
Do you sill have a MAF installed or are you just switching DSMLink for one to the other and effectively running in limp mode when switched to stock MAF?

It would help if you kept your various tuning issues in one thread until you clearly resolve them and update us.

I do have ecm link set to them and all in correct input and I don’t have a maf. And yes I will keep them in one thread.

 

[steve]

Without a MAF setting stock MAF as input forces the ECU into limp mode where many parameters are defaulted. If your car runs better with the defaults it would suggest that your SD setting are a bit off.

 

[Zanaqqq]

Without a MAF setting stock MAF as input forces the ECU into limp mode where many parameters are defaulted. If your car runs better with the defaults it would suggest that your SD setting are a bit off.

Is there any good step by step forum or videos on how to tune speed density?

 

[Justin DuBois]

Is there any good step by step forum or videos on how to tune speed density?

What? - people with ready advice isn't good enough?
You are not struggling with speed density - you are struggling with preliminary setup.

For MAF mode - you need a real MAF
For SD mode - you need wideband data. - You won't be able to set global fuel and adjust your SD table for idle without wideband data in the logs.

 

[steve]

He'll be able to change them he just won't know if he doing the right thing...

This seems like another case where getting the car set up and running on a MAF would be a good thing before jumping into the deep end with SD.

 

[Zanaqqq]

What? - people with ready advice isn't good enough?
You are not struggling with speed density - you are struggling with preliminary setup.

For MAF mode - you need a real MAF
For SD mode - you need wideband data. - You won't be able to set global fuel and adjust your SD table for idle without wideband data in the logs.

I know that. I got a new wideband coming.

 

[Justin DuBois]

He'll be able to change them he just won't know if he doing the right thing...

This seems like another case where getting the car set up and running on a MAF would be a good thing before jumping into the deep end with SD.

If you’re going to configure it for MAF, be sure to recirculate the blow off valve back to the intake.

 

[Zanaqqq]

If you’re going to configure it for MAF, be sure to recirculate the blow off valve back to the intake.

I’m doing speed density, I’m new to this whole car and bought it from an idiot so now I’m fixing everything wrong with it and I’m stupid for that forsure but to late yk.

So I got my new wideband in and got it to read. The number on ecmlink is different from the afratioest but the new wideband number actually reads. The afratioest just snaps from 13.7 to 14.7 etc. the car is still idling and surging badly. It surges from 1400-2200. And afr is decent when it’s at 1400 rpm, then the ecu just adds fuel and fuel trims go from 0.0 to 6.4 slowy while cars revving up (surging). I still have to set base timing but I can’t when it won’t idle. Isc position is like 73 while doing to this

Small note, the manifold port by the idle air controller was capped off and I took cap off and car idled the same. It’s like the car just adds fuel and it revs up and I can’t figure out why.

 

[Justin DuBois]

Sounds like a vacuum leak. Did you do a boost leak test? The trims adjust automatically trying to reach 14.7 afr using the front o2 feedback.