Cleaning EGR

Exactly. Just plug in live data scanner and see what the ECU thinks the coolant temperature is. No more guessing or speculation about the sensor.

 

Is a live data scanner different than an OBDII scanner? I have an OBDII cardoc app that lets me view data from the vehicle.
Is this something different?

 

There are different of ODBII readers with different capabilites. The simplest can read and reset codes, more advanced can show engine data. Most phone apps connected via Bluetooth ODBII adapters can show all data. So by "scanner" I meant ODBII reader with advanced functionality.

 

May have to fool with it and mess around to find it. I picked up the cheap actual corded scan tool that had the capability for under 20 bucks. The Bluetooth with app deal dongle thing should have them too. I actually didn't know my Bluetooth w/app had it before I bought the scan tool itself

 

Yup now that I looked deeper into the app, Im able to read all sort of stuff on the vehicle. According to the app the coolant temp is not the problem. Outside temp and coolant temp were matched this morning when I checked.

Any ideas on other parameters to check that would help me track down this idle issue?

Or any other input on what could cause a low idle on start?

 

I believe the computer will only control the IAC valve to control idle if it knows the throttle is closed, so check the throttle position sensor (TPS). One output determines throttle angle, but I think another is a simple idle position yes/no continuity/open circuit, maybe not shown on live data. There is a specific procedure in the repair manual to check and set the TPS, so don't just mess with it randomly. (I assume the 02 still has TPS.) Just throwing this out as a possibility.

 

You are correct, there is a specific procedure in the manual to check it. Essentially it just calls for using an ohm meter and checking the resistance through the range of the sensor. I checked this a while back and the TPS checked out. I figured out the settings on this live car app so im going to throw a post up with what I found on there

 

Here are the short and long term fuel bank readouts from a drive I did yesterday. The vehicle was close to cold at start, I think it was 60 degrees when I started it, so about 20 warmer than outside air temp

EDIT: Wow those ended up being gigantic images! Let me know what other info would be helpful. My app does the following that I can record:
Fuel system status
Engine load
Engine coolant temp
Short term fuel % trim - bank 1
Long term fuel % trim - bank 2
Engine RPM
Timing advance
Intake air temp
MAF air rate
TPS position
Voltage level
Fuel economy

This isn't the most user friendly app, so the best I can do is those graphs there. Or do screen shots on start or something like that.

Thanks for the help guys!