Loss of power
 

I bought a 53plate Sti ppp a week ago and when I first drove it on v power it started to build up and whistle from 2.5-3000rpm and then from 3 went like a rocket,like being kicked up the arse end but I've used tesco momentum since and it doesn't give you the big kick up the arse as before,it still feels quite quick but not like before,it also feels like its kind of holding back between 80-100 as it takes a long time compared to before.
Is it a boost leak or maybe the fuel??
Not happy!😢
Cheers michael

I bet you're just getting used to it!

Could be what this guy is saying... But another thing to note that this weekend the temperatures went back up above 20c and for my car i notice i difference in power when the air is warmer

Well I'm not sure I'm used to it as I've hardly driven it,I thought It might be heat soak but it was misty,moist and cool this morning and still felt slower

Boost gauge then you won't have doubts

Well had it on the rollers and a checkout,produced decent figures but running a bit lean and AF sensor not working.hoping once that's replaced it will go right again as it could be sometimes working and sometimes not but that's only my opinion as it definitely various from drive to drive