BLM- Long term fuel trim?

[damanx]

Does this log have you connecting and disconnecting the alternator while it's recording?

Just a quick run through that log, and something might be wrong with my tuner pro, but your spark advance looks like it's jumping all over the place on it's own.

Also noticed a MALF code 15 for Coolant Sensor Low.

[rudder2fly]

You can see where I disconnected the alternator it's less than 12v about half way thru the recording. Connected it's 14+ volts. I replaced the coolant sensor last nite it's a NAPA TS4052SB. My question is does the coolant sensor start a high number like 205C in open loop then drop down to 62C in closed loop? How did you read my file? All I see are all kinds of marks. Is this what is called HEX and how do I change this into letters and numbers?

[damanx]

I did not notice the voltage.

At the menu at the top of TunerPro, select "view", then select "toolbars" then make sure that "data acquisition" is checked.

If it is, then you should see the following icons:

A red circle target looking icon, which is a gauge. Select that and a default gauge display will show up. It will look like a digital dash.

The next icon looks like a notepad. Select that and you can see the data and numbers in line by line, (like written on a notepad per se)

Next icon is a clock. This shows info in a table based on rpm/map values.

Last is a bargraph icon. It's the data monitor where you can see things in like a line graph format.

As far as the 15 error, disconnect the battery for a few minutes and reconnect to reset the ecm.

Is the engine block ground good?

Oh, I read your file by opening it in TunerPro. That is done by using the button that looks like an "eject" button, or by selecting "acquisition" then selecting "load log file".

[rudder2fly]

I forgot that I disconnected the coolant sensor while the truck was running yesterday and got that alarm. I will clear it out. It showed 250C disconnected. Is that right? The engine block ground is good. I loosened and retightened same. Thanks GS