Help needed on ignition problem
Posted: Thu Jul 12, 2012 2:36 am
Hi,
Yesterday I was able to test my engine on a rolling road to sort out the problem of rough running at 2500 RPM.
The operator had connected a magnetic pickup on one of the wires of the primary coil side (IGN 1). While running the engine without any load I noticed the following:
1) The rolling road exhaust gas analyzer gave acceptable readings of the fuel/air ratio in the problem area around 2500rpm.
2) When the engine started running rough, the rpm indication of the rolling road dropped to zero and the highlighted cell on the DTA screen jumped from the 5th row (2500rpm) to the first row (?) and back and forth during cutting outs.
Questions;
If the rolling road pickup doesn't sense a ignition output signal (while running OK at higher revs AND at idle), what can the DTA S60 decide to cut ignition? We tried 1000ms up to 3000 ms coil ON setting without any difference in result.
Should I see an ignition output signal even when the coil or spark plug could be faulty? Are there software settings that could initiate this or should I expect an occasional wiring problem.
Thanks for any help on this.
Yesterday I was able to test my engine on a rolling road to sort out the problem of rough running at 2500 RPM.
The operator had connected a magnetic pickup on one of the wires of the primary coil side (IGN 1). While running the engine without any load I noticed the following:
1) The rolling road exhaust gas analyzer gave acceptable readings of the fuel/air ratio in the problem area around 2500rpm.
2) When the engine started running rough, the rpm indication of the rolling road dropped to zero and the highlighted cell on the DTA screen jumped from the 5th row (2500rpm) to the first row (?) and back and forth during cutting outs.
Questions;
If the rolling road pickup doesn't sense a ignition output signal (while running OK at higher revs AND at idle), what can the DTA S60 decide to cut ignition? We tried 1000ms up to 3000 ms coil ON setting without any difference in result.
Should I see an ignition output signal even when the coil or spark plug could be faulty? Are there software settings that could initiate this or should I expect an occasional wiring problem.
Thanks for any help on this.