Clio 172 ph1 loss of power after warmed up

[whiteryno111]

Hey guys

I hope someone can point me in the right direction:
there are no fault codes
the car has this problem with and without de-cat
new throttle position sensor
temperature sensor at thermostat new
dephaser was changed recently timing set with the renault tool
engine with 135.000 miles
95 gas

I've been noticing that my car pulls amazingly well but only before it reaches normal temperature, it's almost the feeling you get with two-stroke engines, lose performance the hotter they get.
I don't push it to redline when colder and am careful when cold, but it certainly wants to get there much faster than when it's warmed up.
I know they like 98 gas better, but could this alone be responsible?

Any input appreciated
Cheers

 

[Mar172]

Mines the other way round that's why I let it get to the normal temp and it pull like a train

 

[whiteryno111]

I've been thinking about the spark plugs maybe the previous owner had the wrong type installed, I don't know what it's running at the moment since they're not very easy to get to...