Low timing, but seeing no KR?
10-06-2004, 11:56 AM
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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....
10-06-2004, 01:41 PM
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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.
10-06-2004, 08:49 PM
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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.
