Low timing, but seeing no KR?
Thread Starter
Teching In
Joined: Jan 2003
Posts: 17
Likes: 0
From: Long Island, NY
Low timing, but seeing no KR? I'm hoping someone can help me out.
A year ago I got H/C and a tune. Timing for w/o throttle was in the upper 20's. Dynoing within the past month, timing was between 18 and 21. Not knock retard at all. Power dropped off dramatically.
I do believe my cats are going bad (rotten egg smell while on dyno). Could bad cats somehow pull timing? Also, stock converter. Any suggestions for a drop off in timing? A tune can't just "disappear", correct?
I've attached the xls logs for the WOT runs, if this can help the experts at all.
Thanks in advance....
A year ago I got H/C and a tune. Timing for w/o throttle was in the upper 20's. Dynoing within the past month, timing was between 18 and 21. Not knock retard at all. Power dropped off dramatically.
I do believe my cats are going bad (rotten egg smell while on dyno). Could bad cats somehow pull timing? Also, stock converter. Any suggestions for a drop off in timing? A tune can't just "disappear", correct?
I've attached the xls logs for the WOT runs, if this can help the experts at all.
Thanks in advance....
Look at your Knock Learn Factor PID. Constant or even
frequent pinging can drive this from 1 toward 0, and
this interpolates the spark between the high octane
(1) and low octane (0) spark values.
frequent pinging can drive this from 1 toward 0, and
this interpolates the spark between the high octane
(1) and low octane (0) spark values.
Thread Starter
Teching In
Joined: Jan 2003
Posts: 17
Likes: 0
From: Long Island, NY
Originally Posted by jimmyblue
Look at your Knock Learn Factor PID. Constant or even
frequent pinging can drive this from 1 toward 0, and
this interpolates the spark between the high octane
(1) and low octane (0) spark values.
frequent pinging can drive this from 1 toward 0, and
this interpolates the spark between the high octane
(1) and low octane (0) spark values.
