RPM up and down during cold start

sbchew

Member
Like to know if this is normal. Most mornings during cold start, the RPM stays at 1100 for about 30 secs and drops to 900. But every now and then, it will drop "too soon" and immediately kick up to 1300 and drop again. Think the "software" was busy ensuring engine don't stall - Symptom is RPM move up and down for another 5secs.

Took it to PML and as usual, they said everything is normal. Did some updates but problem still there.

Anyone can advise?

see 40sec onwards. ignore last 3 secs as I accidentally pressed the accelerator.
 
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