biggy238
Active member
- Joined
- Aug 3, 2008
- Messages
- 10,994
I have a lope that occurs at idle speed (zero throttle input) when load is applied. I found two threads that both imply that the pilot injection is behind it.
My log shows pilot staying constant at 2.17mm, so I modified it to 3mm to see what would happen. When creating the log this morning, the pilot fuel rate was at 7mm constant and I had a ton of white smoke. Lope didn't really improve judging by the log/map
Confused by this, I went back to the file and found the temp adjust tables. What is throwing me off is that the tables dont have a temperature axis. Only mm3 and rpm. Either the mm3 axis is labeled wrong, or something else is going on?
I dont even know that this part of the file is where I need to be spending my time to correct this. I am trying to find the birth sheet for my injectors, but I'm worried it fell out of the box and was disposed of. If it comes to it, I will have to pull the valve cover and retrieve serial numbers. They are exergy 150's.
From the logs, main fuel needs to be at average 565mm idle no load, and average 775 idle loaded to be stable. The last main table change I made was to try and get all the cells at idle at 850mm3 so that the lookup is hitting right around that 775 mark.
This parks me at cmd 38mm3 at 8700psi.
Not satisfied with that result, I threw out that change and took pilot quantity from 2.17mm that was identified in the log to 3.3, flashed it and created another log this morning. The lope was depressed, but was still there.
The wrench thrown in on that log is that it was quite a bit colder than my other logs, just below freezing, so the truck started at high idle and then dropped down to low idle before I pulled it into gear. This log shows the lookup jumping between 38mm and 48mm.
Some time ago, I noticed that any throttle input at all causes the PID loop to break, the lope immediately disappears, and this is how I arrived at the mm3 I thought it would take to make this stop.
You can see in this log that applying just enough throttle causes the loop to break.
I sort of feel like the 0 throttle idle is a table that isn't exposed in EFI but that's another topic.
I know comp missed my long winded convoluted posts.
My log shows pilot staying constant at 2.17mm, so I modified it to 3mm to see what would happen. When creating the log this morning, the pilot fuel rate was at 7mm constant and I had a ton of white smoke. Lope didn't really improve judging by the log/map
Confused by this, I went back to the file and found the temp adjust tables. What is throwing me off is that the tables dont have a temperature axis. Only mm3 and rpm. Either the mm3 axis is labeled wrong, or something else is going on?
I dont even know that this part of the file is where I need to be spending my time to correct this. I am trying to find the birth sheet for my injectors, but I'm worried it fell out of the box and was disposed of. If it comes to it, I will have to pull the valve cover and retrieve serial numbers. They are exergy 150's.
From the logs, main fuel needs to be at average 565mm idle no load, and average 775 idle loaded to be stable. The last main table change I made was to try and get all the cells at idle at 850mm3 so that the lookup is hitting right around that 775 mark.
This parks me at cmd 38mm3 at 8700psi.
Not satisfied with that result, I threw out that change and took pilot quantity from 2.17mm that was identified in the log to 3.3, flashed it and created another log this morning. The lope was depressed, but was still there.
The wrench thrown in on that log is that it was quite a bit colder than my other logs, just below freezing, so the truck started at high idle and then dropped down to low idle before I pulled it into gear. This log shows the lookup jumping between 38mm and 48mm.
Some time ago, I noticed that any throttle input at all causes the PID loop to break, the lope immediately disappears, and this is how I arrived at the mm3 I thought it would take to make this stop.
You can see in this log that applying just enough throttle causes the loop to break.
I sort of feel like the 0 throttle idle is a table that isn't exposed in EFI but that's another topic.
I know comp missed my long winded convoluted posts.