Cranking/startup questions (log and msq included)
#1
Cranking/startup questions (log and msq included)
Hi guys.
I actually meant to include a cold start as well but I accidentally did an overwrite of that log. Oh, well - it'll come later, so lets start with the warm startup:
Looking at the log, the thing that worries me the most is dwell. It's set to be 2.5ms both cranking and running (per TSE instructions) but is logged as 5.1 - 5.7ms during cranking and then settles at 2.5 when the engine is running. What's going on? Is there any danger of frying my coils?
Cranking RPM is set to 300 but only logs at around 180. It starts ok'ish when warm but rather reluctantly when cold (I'll do a log later). During cranking, the DIYPNP logs the voltage as dropping to around 9V, which I believe is too low. However, a voltmeter on the battery during cranking says something like 10.5V, which sounds more like it. Any ideas for improving the cranking RPM? Should I consider a new battery?
Cheers,
- Tom
I actually meant to include a cold start as well but I accidentally did an overwrite of that log. Oh, well - it'll come later, so lets start with the warm startup:
Looking at the log, the thing that worries me the most is dwell. It's set to be 2.5ms both cranking and running (per TSE instructions) but is logged as 5.1 - 5.7ms during cranking and then settles at 2.5 when the engine is running. What's going on? Is there any danger of frying my coils?
Cranking RPM is set to 300 but only logs at around 180. It starts ok'ish when warm but rather reluctantly when cold (I'll do a log later). During cranking, the DIYPNP logs the voltage as dropping to around 9V, which I believe is too low. However, a voltmeter on the battery during cranking says something like 10.5V, which sounds more like it. Any ideas for improving the cranking RPM? Should I consider a new battery?
Cheers,
- Tom
#4
I've attached a cold start (4°C / 40°F). Of course it started up no worse than warm on the day I had the PC ready set up to log. Oh, well. I'll attach another when I log a more typical cold start. Either way, the logged cranking voltage and RPM are even lower - around 8 V and 110 - 140 RPM - and dwell time is even higher at around 6 - 7 ms.
- Tom
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