How difficult was it to change the MAP sensor? Will keep an eye out for your spiritmonitor to see if there's a difference. Shouldn't the overflow tank always be filled then...in case I get caught short?

The Map sensor was relatively easy to swap. Just an electrical connector (I found this a little tricky at first, but a strategically placed small flat-headed screwdriver helped it off), two torx screws, and it pulls straight out. It's at the back of the engine just below the throttle body.

The overflow is designed to allow for expansion. Say if you fill up and leave your car in a hot sunny environment, petrol can expand and if there was no overflow it would find its way out. If you have filled the expansion tank to its max then you might have problems with petrol escaping. I see no issue with doing it before a long journey though, other than difficulty accurately determining MPG.

The Map sensor was relatively easy to swap. Just an electrical connector (I found this a little tricky at first, but a strategically placed small flat-headed screwdriver helped it off), two torx screws, and it pulls straight out. It's at the back of the engine just below the throttle body.

The overflow is designed to allow for expansion. Say if you fill up and leave your car in a hot sunny environment, petrol can expand and if there was no overflow it would find its way out. If you have filled the expansion tank to its max then you might have problems with petrol escaping. I see no issue with doing it before a long journey though, other than difficulty accurately determining MPG.

Thanks for the advice! Forgot about elementary physics :p

Seems like most of your 30+ mileages were on redex. So it's most economical to stay at 60mph on satnav?

Edited 19 July, 201114 yr by fsa

if you use synth oil (trans and engine) run clean injectors and 35psi all arround tyres you can get 7.4 town easy if you keep your eye on the trip computer (i´ve done it.) just dont go over 2k until fully warmed and switch gears @ 1800/ 2600 k dont go over 55

i´ve clocked 7.4 on town and 6.8 in highway (doing constant 55)