just got my car fully serviced included ngk platinum plugs, oil, filter, gear oil, diff oil etc problem was going on before service and is still doing it

mods -

full turbo back decatted exhaust, ported headers, sti tmic, k&n panel filter, walbro fuel pump, ecutek remap for bp ultimate 97 ron

at times under load at about 4k upwards in 2nd and sometimes 3rd the car jerks?

would i try using different fuel?

 

Its the BP fuel, happened to me last week, would rather use cats **** then ultimate its worse then 95ron that's stuff. Further more who mapped your knowing your using bp ultimate?

 

bob rawle mapped it and asked what fuel and i said bp ultimate, was mapped for 97 ron and im using bp ultimate and i may give it a go and try using different fuel

 

Shell V-Power everytime.

 

il start giving shell v-power a go, would i have to let the car get used to different fuel?

 

I went from ultimate to tesco 95 and it runs far smoother with no judder. cant beat v-power or momentum i just dont have any near me