Is it possible to tell if their is an air leak by the vacume on your boost guage?

And when my car is running, if I lift the oil cap it sucks it back on, so their must be good vacume - but again will this show if i have a leak?

Car starts if you leave fuel pump priming (bridged relay), press the flap down once, or if cranking and someone holds flap down bout 5mm

runs dog rough when cold, try and rev and it'll cut out, after a minute it's perfect!

And do S1's have the heated seat fuse?

im off to check for that fuse!!!