Earnest,

 

When I first turn on my fuel pump, I can hear vapor being purged thru the lines.  I let the pump run for a few seconds and also turn on the secondary pump to purge it as well prior to beginning the engine start procedure.  This is even more important if the engine is heat soaked.

 

Mark’s starting procedure is very close to mine at the various temperature situations.

 

Your manifold pressure in KiloPascals threw me for a loop for a while!  :>)

 

Bill B

 

 

On 05/15/2011 09:12 AM, Bill Bradburry wrote:

Earnest,

 

If it is the first time I am starting my engine, I set the mixture at full rich, give it about 2-3 primer shots, and it kicks off after only a couple of blades.  If I don’t do the primer shots, I get a response like you did.  You didn’t mention if you used primer shots???  As the engine warms up, I reduce the mixture gradually back to the center mark at idle.

 

Don’t go overboard on the primer shots.  You will flood the engine.

Primer shots are one of the adjustable parameters in MegaSquirt, and it varies based on temperature.  There is also a "clearing shot", meant to release any vapor in the fuel lines from a hot engine.  There is also a cranking enrichment and a warm-up enrichment, again both being further adjusted with a table lookup based on temperature.

My goal for the first run was to get to spin without the aid of the starter.

 

Bill B

 

 

http://www.youtube.com/watch?v=YoYEZk6X1nA

This portion from the datalog is where it kicked off and ran.