Cranking RPM and timing

Daniel Ahlin · Post by **Daniel Ahlin** » Thu Jul 20, 2006 6:02 pm

Does the spark timing depend on the Cranking RPM setting?

I tried to start my engine today and the timing was off. Now when I have checked things I found that my Cranking RPM was set to 300 and the real RPM while cranking is 200.

Using
Megasquirt and Edis, timebased crank timing

snillet · Post by **snillet** » Thu Jul 20, 2006 11:55 pm

Cranking rpm is the switchpoint at which MS leaves the cranking settings and goes into RUN.

Was your timing off in cranking or run ?

Daniel Ahlin · Post by **Daniel Ahlin** » Fri Jul 21, 2006 1:45 am

Its while cranking, the engine doesnt run yeat.

When I crank it backfires and the timing light I had yesterday didnt trigger with my engine. It triggers fine with my other car.
Theres a good spark on all plugs.

Post by **jsmcortina** » Fri Jul 21, 2006 2:05 am

During cranking the code uses the "cranking advance" setting to determine the advance when in timebased mode, or fires directly off the input signal in trigger return. So verify these settings are correct.

James

Daniel Ahlin · Post by **Daniel Ahlin** » Fri Jul 21, 2006 6:27 am

The timing was off by 180 degrees. Coil A & B wires where switched.
When I got that sorted it started directly and idles fine with lambda 0.78

snillet · Post by **snillet** » Mon Jul 24, 2006 3:57 am

Daniel Ahlin wrote:The timing was off by 180 degrees. Coil A & B wires where switched.
When I got that sorted it started directly and idles fine with lambda 0.78

there are so many little details that makes big issues