Need help getting car to idle when cold

[Dukenukemx]

Since I put a cam in my 02 Vette I can't get it to idle unless I let the car warm up. It'll idle just fine when I crank the engine, but it's when I shift into gear it just stalls. Once I warm it up this isn't a problem, but it takes a while to warm up like at least 5-10 minutes. I've increased the airflow and the idle but doesn't seem to matter since putting it into drive or reverse will just stall it out. What other values can I change in TunerPro to correct this? The OS is 12221588.

[ralmo94]

Did you ever get a wideband o2? If you did, you could tune the warm up enrichment
If not, what are your O2 readings before it goes cl, pegged, or almost 0?
Is it cl when it does this? Maybe keeping ol longer, or going cl sooner would help?

[Dukenukemx]

Did you ever get a wideband o2? If you did, you could tune the warm up enrichment
If not, what are your O2 readings before it goes cl, pegged, or almost 0?
Is it cl when it does this? Maybe keeping ol longer, or going cl sooner would help?

No wideband yet. I figure that's for next year when it isn't so cold. I do have the trans cooler but not installed for the same reason. I don't have a garage to park my car in. I never looked to see what the O2's are reading. I'll give it a try tomorrow and see what they say.

[Dukenukemx]

I did a quick startup at idle and logged it but it didn't report short term or long term trims until it warmed up a bit which took a few minutes. I then saw it report -22% and then slowly climbed up to around 0%, which I then put the car into drive and reverse and it didn't stall. So I guess that means I'm running too lean? Is this something I adjust in the VE table or there's another set of variables that control startup idle? I would have guessed it ran too rich just from the smell of the exhaust.

[ralmo94]

it report -22% and then slowly climbed up to around 0%,
So I guess that means I'm running too lean?
I would have guessed it ran too rich just from the smell of the exhaust.

-22, means it is taking 22 percent out, that is rich.

Is this something I adjust in the VE table or there's another set of variables that control startup idle?

There should be a table of commanded ratio per engine temp, and possibly a warm up multiplier?
You don't want to change VE, you already tuned it.

[ralmo94]

I found a Stock file on HPT Respository
Here is the table and HP description

[ECM] 12430 - Open Loop F/A vs. Coolant Temp vs. MAP: This table is used to determine the commanded AFR when in open loop mode. It divides the Stoich AFR value. AFR is determined by 14.7/table value. Example: 14.7/1.30 = 11.3 AFR
Open Loop FA.jpg
I don't know how it is labled in UP