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My idle is a little low I beleive (+/-650 almost 700 rpm). I feel a vibration at idle. My D17a2 head was port & polished about 2 weeks ago. It was running fine until I pressure washed it... Now it wants to stall a bit in the morning when cold and humid, runs fine when warm but my idle is low. I don't know if the humidity/water issue is related to the low idle but I want to know if there is a way of adjusting the idle rpm. It's only since we unplugged and checked every plug/connector after I washed it that it's been vibrating at idle.

 
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Could it be map or iac ? Anyone had issues with those? Coils?

 
Rep Power: 452

talk to gearbox, I think he had some of the same issues when he had his head worked. So he might know what to look for. But 650 for the idle when warm seems about right.