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flightlead404 flightlead404 is offline
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Join Date: May 2015
Posts: 798
Originally Posted by Reanimotion View Post
logging during several cold starts should provide some clues as to the variables that might be in play

it's all going to be about balancing the transition from off to cranking to running

accumulator pressure - fuel pump turn on - cold start injector status - FV and CP ratios all need to be tweaked to ensure the system has and maintains fuel pressure and subsequent delivery during the startup

for example, until the engine turns faster than the "crank speed" setting, the system is essentially in fuel cut mode and the majority of fuel delivered will be from the cold start injector only. And the thermo time switch on the cold start circuit limits delivery to 8 seconds or so of total cranking.

warm start seems ok from the log but cold might be turning a little slower and not kicking over the set point
lowering the cranking speed setting from 300 to maybe 150 or less will bring the CP and FV control in earlier
I'll give that a shot. Trouble with cold start testing is that I only get one shot at it.
Old 01-26-2017, 10:13 AM
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