View Full Version : Commanded Fuel Pressure

January 4th, 2012, 07:27 PM
I was logging a 6.7 tonight and noticed some varying readings. When first logging the truck ran smooth and the balanced vs uncompensated rates were very close. 2nd log the truck would stumble right after a shift. Rates were almost consistently off by 15 units. Logged the truck again and it started slightly off then pretty much matched back up. No more stumbling. We never even shut the truck off in between logs. I was just messing around with different pids. What makes up the differences in these 2 readouts? Is it a sign of regen? Anybody else notice this?

January 5th, 2012, 03:32 AM
I'm not fully understanding.. care to post the log?

January 5th, 2012, 03:48 AM
The logs are on my other computer so i will post them up this evening.

January 5th, 2012, 01:04 PM
Log files attached. #1 and #3 are normal and #2 is where the differences are. The pids available on all the logs change but you can watch the commanded fuel pressure, both balanced rates and uncompensated on all of them.