Zexxon

I have learned idle properly according to Dale's instructions.

The car idles perfectly when started for the first time, 2nd and 3rd etc.

However when the car is left out in the sun (100+ F) for more than 30 minutes and is started the idle is incredible rough for about 30 seconds. The water temp is generally 105c at this point and quickly cools down to around 95 or so. Once water temp has cooled it's OK. It seems like the car is almost running too lean due to the temperature? The o2 sensor doesn't give me anything useful in terms of feedback as it doesn't start sending anything back until around 2-3 mnutes of actual driving/idling.

It's not a big deal but it's a tad annoying and in some cases the car will actually stall when attempting to start when it's been baking in the sun.

Any suggestions? Other than that the PFC runs very well if a tad on the rich side.

I have also hooked up my O2 sensor output to the apexi turbo timer and it works well. I suspect though I need a new O2 sensor based on the following:
It takes around 2-3 minutes before the O2 sensor starts generating real readings (i.e. > 0.01 that fluctuates based on accelerator position and rpm level).
The O2 sensor has around 55k miles on it.

Thanks!

arghx

iTrader: (3)

this is a common problem and has to do with heatsoak on the intake air temp sensor. you can't mess with it without a datalogit

Zexxon

Thanks arghx

That makes sense, the air temp is generally around 85 degrees when I start the car and then it cools down quickly. I am running a stock SMIC which I will be replacing end of this week - that should help with the heat soak.

I am having the car tuned next week and I'll definitely ask about that.

cewrx7r1

iTrader: (2)

High heat soak also retards timing as a protection against on-boost overheating.

Dudemaaanownsanrx7

iTrader: (23)

replacing the intercooler wont help much with heatsoak of the intake sensor, as it sits right above the engine on a large chunk of aluminum (UIM). The only way to help this is to move the intake sensor but as mentioned you will need the datalogit so you can change the AIT tables.

cewrx7r1

iTrader: (2)

Contact BDC as he could make the mod change for you.
http://bdc.cyberosity.com/main.php