24 degrees intake temp isn that bad, in fact its pretty decent after a full WOT run in 4th.
Is your fuelling ok and your sparks all ok?
Fueling i have no idea phill...I get paid next month so a A/f wideband gauge is on order
It was a run in 3rd from low down..Im using ngk ones at the mo and have some 3month old ik22 which i took out as i thought it was my plugs over fueling...