protomor wrote:It could be AE. could be a dead spot in the TPS or the calibration is off.
billr wrote:Looking a the .msl I have two questions: I see the TP "marker" spike at about 5.5 seconds, but nothing just preceding that which would indicate a misfire. The posted screen-shot looks (to me) like it is the TP and PW right at the time the marker is made, but doesn't really relate to the misfire event. Is there some logged parameter that clearly indicates misfire? I'm guessing only a knock sensor could do that, but don't see how to display that signal. The other question relates to spark advance. I see several points (74,85,101,103,107,110, and 116 seconds) where the advance makes a "step change" when things like rpm, MAP, PW, and TP are all relatively constant. What could make advance do that? I admit, these questions are as much about helping me as the OP, but maybe they will help...
kizzoalfa wrote:As I marked the missfire the AFR became richer after the event means unburnt fuel.
today I changed the decel fuel amount to 100, same misfire. I also turned off AE later, did not help. I also noticed that around 14.4 - 14.7 AFR while cruising my engine somtimes have a small surge.
Does it possible that what I think misfire is a lean surge caused by that my engine need to run richer ?
(Engine has 7.8:1 CR, 9mm lift 272 deg exhaust and intake cams, IO 22deg BTDC, EO 63 BBDC.)
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