I've changed the hard petrol pipes on top of the plenum to soft ones as i have a front strut brace and re-fitted new hose clamps size 13.5 (i think) however even though they are done up tight and are i'm sure the same size as the original they leak fuel twhen the car is cold....

 

Is there somewhere that sells really tight fitting clamps or should i just try the next size down maybe 12 or 12.5???

 

Also not too sure if one of my fuel regulators is leaking do these leak or is it probably the pipe join???

if they leak enough to smell it then you can also see it. Look under the car next time you start it in freezing weather you might see the fuel running off the bottom of the bell housing. Mine came from underneath the fpr and run down pipes into the vee of the engine and out the back and down onto the floor. You just couldnt see it until you looked under the fpr with the plenum trim already off. Once it warms up a bit it stops so you have to check when stone cold.

 

Mind the fpr has 3 connections - its the one you cant see right underneath it that causes the problems. It feeds down to the injector rail and probably suffers most from heat hardening.