Cruise log help ecm link

[jacobbyrd]

I've attatched about a 5 min. Cruise log for a visual.

Basically, my primary question is, when I let off the throttle completely and coast, I noticed on my wideband it went from fluctuating between 13.5-15 to 22. (not yet hooked up to ECU doing that next week so I can log)

After I got home, and examined the log, I noticed that when I am coasting, my car leaves closed loop mode, combined ft goes back to 0, airflow perrev drops to .15, and front o2 drops down to 0.

So, I'm guessing what is happening is happening becuase it is leaving the closed loop mode, but my main concern and question is: Is this normal? If not, how can I keep it in closed loop mode when coasting so I can tune that as well with MAFcomp adjust?

Also, If you see anything else that looks questionable/bad, please let me know. Keep in mind that this log was before my MAFcomp adjustments, and what they were based on.

 

[LiquidX]

Not to mention, if you have a wideband, it would help greatly if you had it being logged for your idle tune you are asking about at well.

http://www.dsmtuners.com/forums/newbie-forum/396566-ecm-link-idle-check.html

 

[jacobbyrd]

I don't have 30 tech posts so it won't let me. Wish I could

 

[gofer]

What you're describing is coasting fuel cut and its necessary that it happens when the cars coasting (throttle plate closed) so it doesn't flood with fuel and die.

P.S. There is no log attached to your OP so we have no way of looking at it.

 

[jacobbyrd]

What you're describing is coasting fuel cut and its necessary that it happens when the cars coasting (throttle plate closed) so it doesn't flood with fuel and die.

P.S. There is no log attached to your OP so we have no way of looking at it.

oops! here's the file. And thanks for clearing the coast thing up for me I wasn't sure whether or not that was normal.