172 HOLDING BACK WHEN ENGINE WARM

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Hi all weird my cup is holding back when warm its rapid in low gears then at say 50 plus its seems like its holding back when warm had a few 172s never encountered this car is fine cold just a bit odd driving after engine up to temp,any help thanks

 

[Joe R26]

My money's on coil pack or leads if it's misfiring.

 

[Diagro]

Well mine is a rocket when above 50mph. Its in second it sucks lol

 

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Hi had had major service original blocks leads,cts sensor crank sensor and loom,battery would coil pack cause power loss?