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ECMlink SD erratic idle logs; ID2000 dial-in

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WIDSM

15+ Year Contributor
245
0
Feb 4, 2006
milwaukee, Wisconsin
I posted this on the link forum but I figured that more exposure can only help.

I haven't messed with the car in a while. I just finished fixing a boost leak at the fiav.
The car wasn't idling very well before this either.
The problem(s): the car will not stay running on its own, I have to keep my foot on the gas pedal, even if it is ever so slightly.
Without giving the car throttle on start-up it will start and then the rpms will fall, and the car will die. I have repeated this over and over, cold and hot and there is no change.
There are times when the car will missfire, this I believe is due to the fact that it is running very rich.

Now I got the airflowperrev dialed in pretty good, I think.
I then moved on to trying to dial in combinedFT. I had the deadtimes all over, but in the last log (the shortest one) I have the deadtime at 50. The car seems to behave relatively well, however I still have to keep my foot on the gas.
even where the TPS is showing 0% I usually have my foot rested on the pedal slightly because without this, the car will only idle for a few seconds before dying. (there are multiple examples of this in the logs).

I attached mostly the longer logs to give a broader sense of what is going on. I have other logs also if needed. If I changed something I would start a new log to document this.

During this period I also swapped out the spark plugs because the car started miss firing really bad. I had br6s in there and swapped out for 8s @ .027. The gap was just a guesstamation, I'm not sure it really matters at this point.

I haven't driven the car yet because the idle isn't where I want it, so I will address that when I feel comfortable about the tune.

Everything in my signature is up-to-date.

I appreciate all responses, obviously I'm not very good with this so I'll take any advice.

edit: Maybe I should also note that I did replace the shaft seals on the stock 1g throttle body, and cleaned everything, and installed a new tps, the old one got a little melted from welding on the throttle body. I also replaced the biss oring and have it screwed in all the way. There is no fiav or isc on the throttle body.

Mods:
92 laser awd: aluminum rod 1400hd piston combo, l19, built head, fp2s, gt4294, jmf vband top mount manifold, tial bov, 255 in tank, 044 inline, -8 fuel line, tre stage 3, qm twin disk,ngk wb, afpr, Jmf smim, id2000s, v3, SD, e85
 

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1. You are using NB simulation, but the switching voltage isn't close to being correct, at least not for any WB I've seen. They are usually set to switch somewhere around 2.5v...not at 4v.

2. You have no front O2 signal. This is causing you to run extremely rich during idle, which is most likely washing down your cylinders.

3. Your VE table is very "abnormal" for lack of a better word, but without a working O2 sensor it's somewhat expected.

4. Your DA tables are pretty bizarre.

Honestly, at this point you need to start over. Get any mechanical issues fixed, get the NB simulation set up correctly and a working front O2 signal, load the default DA tables, and start getting airflow calibrated.

Also, please fill out your vehicle profile.
 
Last edited:
1 I got my switch over point from the link wiki but I will check this this again.

2 I have no front 02 signal because I have no front 02. Only wideband.

3 VE table is something I was changing to get airflowperrev close but I can revert back to stock and start fresh.

4 DA tables, I haven't touched those to my memory so I'm not sure why they aren't at stock values but I will look again.


1. You are using NB simulation, but the switching voltage isn't close to being correct, at least not for any WB I've seen. They are usually set to switch somewhere around 2.5v...not at 4v.

2. You have no front O2 signal. This is causing you to run extremely rich during idle, which is most likely washing down your cylinders.

3. Your VE table is very "abnormal" for lack of a better word, but without a working O2 sensor it's somewhat expected.

4. Your DA tables are pretty bizarre.

Honestly, at this point you need to start over. Get any mechanical issues fixed, get the NB simulation set up correctly and a working front O2 signal, load the default DA tables, and start getting airflow calibrated.

Also, please fill out your vehicle profile.
 
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