Revolution Mode or Cylinder Mode to adjust missfire sensitivity?
05-04-2008, 09:49 AM
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Revolution Mode or Cylinder Mode to adjust missfire sensitivity? Hey guys, i have a p0300 random missfire code and i know i have to adjust the sensitivity on the missfire tables, but my only question is do i change the low, medium, high in Revolution Mode or Idle(moving), Medium, or High in Cylinder Mode? What one and whatvalues do i change to? 32767?
05-04-2008, 12:26 PM
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Look at the misfire current cylinder 1-8 and misfire current
revolution in the scan tool and see where you are getting
hit worst. You might just try doubling table values to keep
some gross misfire detection ability. Cylinder mode is at lower
RPM and at some point the PCM can't keep track fast enough
and flips over to revolution mode. I would suspect low end
is the problem, with cam & converter making a lot more crank
ripple.
But "Kill 'em all!" is an option.
revolution in the scan tool and see where you are getting
hit worst. You might just try doubling table values to keep
some gross misfire detection ability. Cylinder mode is at lower
RPM and at some point the PCM can't keep track fast enough
and flips over to revolution mode. I would suspect low end
is the problem, with cam & converter making a lot more crank
ripple.
But "Kill 'em all!" is an option.
05-07-2008, 11:18 AM
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Whole table(s) to 32767 will do it.
If your misfire hits are lower RPM then cylinder mode tables; if
they are popping at higher RPM then revolution mode. If you just
want it gone then populate all the tables with 32767 and you're
done. But then you won't know which plug wire fell off, is all.
If your misfire hits are lower RPM then cylinder mode tables; if
they are popping at higher RPM then revolution mode. If you just
want it gone then populate all the tables with 32767 and you're
done. But then you won't know which plug wire fell off, is all.
