Lean Idle When Cold

[spadepro22]

When my car is cold and I crank it up, it will start right away but the rpms will drop low and my wideband goes lean and seems to want to cut off and sometimes it does. The tone in my exhaust changes as well(slight popping sound). It cranks right back up and every time they drop low it leans out(16ish- til wideband readys says lean) and wants to stay there until warm. Once its warm my wideband ready 14ish-15ish. This was just a idle problem in the am but now it seems to be getting worse. Ill post a log from this morning and another when I get up in the morning.(I stoped the log when it started readin 14ish)

 

[RWD4G63]

I can't see the log, but do you know what your Coolant temp sensor is reading when cold?

 

[Screamin4g63]

I can't see the log, but do you know what your Coolant temp sensor is reading when cold?

run scan my guess is coolant sensor or 02 sensor

 

[Talondvr]

Your AirFlowPerRev seems to be low?? I've read it should be at .24-.25 Anyway it kinda looks like the O2 sensor is taking a while to warm up. I don't know though. Mine does the same but reads rich (9-11afr) for a couple minutes till the NBo2 starts cycling. To me, and I'm a noob still with Link, it seems like you need a better tune. At least watch the videos at ECMTuning, Inc. if you haven't already.

 

[spadepro22]

Your AirFlowPerRev seems to be low?? I've read it should be at .24-.25 Anyway it kinda looks like the O2 sensor is taking a while to warm up. I don't know though. Mine does the same but reads rich (9-11afr) for a couple minutes till the NBo2 starts cycling. To me, and I'm a noob still with Link, it seems like you need a better tune. At least watch the videos at ECMTuning, Inc. if you haven't already.

It was tuned by a motor shop that built it. Is runs fine for the most part, just cold idles.

 

[Sprnt76]

Check the ICM or ICA, anyways it stands for either idle control monitor or adapter, mine is acting up and is causing the opposite, idling high

 

[spadepro22]

Heres a log from this morning until car was warm

 

[1996dsm]

mine does the "exact" same thing in the mornings.

 

[spadepro22]

Will this cause damage to my engine?

 

[Brandon Mau]

Your airflow should be at .25 grams at idle and your's is def. way to low. You need to adjust some of your settings in link. Your maf tabs to bring up your air flow rev from that average of .15grams/minute and obviously you will have to play with fuel trims, deadtime ect. so everything is in sync.
I don't know how long it has been doing this but you said it has gotten worse lately which could also be a sign of boost leaks which would be the answer to your low airflow per rev data. Did you set-up the vehicle initially at .25 grams per minute? In your profile you only have a balance shaft delete done to the motor. No stroker set-up ect. so your 2.0 liter should be .25g/min at idle.

 

[spadepro22]

Your airflow should be at .25 grams at idle and your's is def. way to low. You need to adjust some of your settings in link. Your maf tabs to bring up your air flow rev from that average of .15grams/minute and obviously you will have to play with fuel trims, deadtime ect. so everything is in sync.
I don't know how long it has been doing this but you said it has gotten worse lately which could also be a sign of boost leaks which would be the answer to your low airflow per rev data. Did you set-up the vehicle initially at .25 grams per minute? In your profile you only have a balance shaft delete done to the motor. No stroker set-up ect. so your 2.0 liter should be .25g/min at idle.

It was tuned by a motor sports shop that built the car. Before the tune it was running really rich at idle(11ish). After it warms up, its fine, just when its cold. I know nothing about tuning, and I just want to know if its the tune or do you guys think it might be bad sensors or something.