Engine Hiccups

Hi all.
My 1995 1.3 K11 has recently started having "hiccups" for the first few minutes I drive. The revs suddenly goes up and then drops back down, causing it to jerk forward. I've done the TB resoldering job but it didn't really get any better. Any ideas?

Sent from my STF-L09 using Micra Sports Club mobile app
 
Scare it or get it to hold it's breath, generally sorts out hiccups !

Is it more of an engine misfire?
I'd check plugs and leads.
 
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