960 Rough Idle

[jonnyf90]

Originally Posted by Laird Scooby

They probably would but usually more at the lower end of the rev range and possibly the very highest end. In the middle the coils output will be at its highest due to resonant frequency of the coils themselves. This usually overcomes any mixture deficiencies of a weak crusing mix and keeps it firing.

However, if what i suspect is correct about the lifters etc from the hibernation then you should notice a difference after af ew days with the ATF in the engine. Then you will have a much better idea of what the engine is or isn't doing, often things like this are a simple fix so try that first, if nothing else it levels the playing field so there aren't compound faults (many with minor symptoms creating one bigger symptom not necessarily related to the minor ones) throwing out red herrings.

It's been a few months and I thought I'd report back!

The ATF helped a little, but the misfire was still there.
While clearing out leaves and debris from the engine bay this morning, I removed the MAF multiplug to give it a clean, and surprise, misfire gone instantly!
Now time to clean and/or replace once it warms up a bit - it's too cold outside right now!

Cheers