kjlindgr
November 22nd, 2014, 07:49 AM
Guys,
I'm having an issue with what appears to either be a fueling or spark issue when I blip the throttle and it tries to settle back in to idle. As it comes back down, spark ramps back in, the engine shutters/chugs/shakes, and then it finally ramps out and all is well again. I've got a log and my tune file attached as well as a picture of the problem area.
Just as an FYI, this is after a cam and NW102 throttle body only install. It was running great prior.
Here are my thoughts, but I'm not familiar enough with programming this to figure it out or where to start:
1: I see that it is dead lean, so is this a minimum idle airflow issue and it's trying to save idle by ramping in spark? Or doesn't fueling matter as it's coming back to idle??
2. I was told it could be a throttle follower issue, but I've played with these tables and can't get it to act much differently.
3. I've tried to limit the idle low rpm correction tables and I still can't seem to control this.
4. This is completely normal activity and there is another issue I'm completely overlooking...
Any help on where to look? Any ideas if it's a fueling issue I should be running after or a spark issue? I'm really lost here guys... :(
Video showing what's happening:
http://www.youtube.com/watch?v=jqkXH98Npas
Log File:
17712
Area in the log file where this is happening:
17713
Tune file:
17714
I'm having an issue with what appears to either be a fueling or spark issue when I blip the throttle and it tries to settle back in to idle. As it comes back down, spark ramps back in, the engine shutters/chugs/shakes, and then it finally ramps out and all is well again. I've got a log and my tune file attached as well as a picture of the problem area.
Just as an FYI, this is after a cam and NW102 throttle body only install. It was running great prior.
Here are my thoughts, but I'm not familiar enough with programming this to figure it out or where to start:
1: I see that it is dead lean, so is this a minimum idle airflow issue and it's trying to save idle by ramping in spark? Or doesn't fueling matter as it's coming back to idle??
2. I was told it could be a throttle follower issue, but I've played with these tables and can't get it to act much differently.
3. I've tried to limit the idle low rpm correction tables and I still can't seem to control this.
4. This is completely normal activity and there is another issue I'm completely overlooking...
Any help on where to look? Any ideas if it's a fueling issue I should be running after or a spark issue? I'm really lost here guys... :(
Video showing what's happening:
http://www.youtube.com/watch?v=jqkXH98Npas
Log File:
17712
Area in the log file where this is happening:
17713
Tune file:
17714