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ignition advance timing & other sensors' params

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Old 23 May 2011, 05:32 pm
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Join Date: Sep 2008
Location: Continent
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Default ignition advance timing & other sensors' params

hi everyone,
i'm trying to diagnose my PT's rough idle / random misfire issues.

no codes stored at this time.

wires & plugs changed, ignition coil replaced - no joy.

i've looked at some sensors' output at idle speed and would like to verify if they are within allowed ranges or whether they act up and should be looked at more closely?

engine warmed up, RPM go from 921 to 1106, MAP sensor gives 29 to 32 kPa.
now, the puzzling bit is ignition timing advance for #1 cylinder - it fluctuates between 7.5 and 18.5 degrees.

is this normal ? would these be the cause of the problem or simply an indication of it?

your help would be greatly appreciated
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