Originally Posted by
matrixmike28
I have a gen 5 7 port on a 2013 with the short LSN. After tuning the motor this weekend the LSN was almost one full turn out from flush and the HSN was 1 turn in from flush. Based on what I have read on here this seems in contradiction to others tuned settings. The motor is running great with plenty of smoke all through the powerband. Should I be concerned about this? My only thought is that maybe my idle gap is way off even though it doesnt appear to be. If I try and turn in the LSN it makes the idle go up dramatically. Oh it is running at around 230 and idleing all day.
That does seem wierd, but as you stated it runs fine !
If your happy leave it, but if your curios, as I also am;
When the engine gets up to temp, does it run on when back off the throttle ?
This would indicate a fat bottom hiding a wide idle gap.
you stated that if you lean on the LSN the idle rises, try this again just a little at a time untill it just seems to rise and try turning down the idle, does the idle drop ? If not,stop, If so, keep going only in small incriments untill the idle gap reduction doesn't reduse the idle, this indicates you'v gone too far.
Richen the LSN about 1/2 a turn and turn up the idle again untill at a point where engine can keep running.
PS; this is done while engine is at full temperature.
Once you have done this and you seem to lose power or lean bog, try richening the HSN untill this is fixed, the reason being that your old LSN fat setting would have hiden a lean HSN setting.
I hope I made sence, I'm hopeless at trying to explain on line. LOL.