Hot / Cold starting

[Widge]

My 325i has always been right on the button when cold starting, but some times when warm it takes a prod of the accelerator to get it to catch. And when it does it seems to fire twice very slowly (doesnt even register on the rev counter) then the ecu kicks in and it goes to 900rpm. Also I think there is a slight fuel leak from somwhere in the engine bay. I say slight because it's in consistent and some times doesn't leak at all!

However lastnight 33deg F on the OBC and it wouldn't start from cold without gas and then did the same thing when warm????????????????
AAAAAAAAAAAGGGGGGGGGGGGHHHHHHHHHHHHHHHH

The thing is it's a very in consistent problem/character trait, sometimes it'll start fine for weeks. It runs fine when it's going.
Cheers
Guys

[Ant]

as always fot a new coolant temp sender first, then see what happens.

I had one in the other day with same issues, new sender and all was well again.

come back if its still no good or you've covered this item already dude.

Get one from the stealers, its the blue one not the brown one BTW.

[Widge]

Cheers buddy I'll try it this w/end and get back to you.
Any ideas about a fuel leak? I had heard some where that the low pressure return pipes are prone to weeping.

[Ant]

check all the hoses you can see dude, check the seals on the injectors and fuel regulator too, maybe the fuel is evaporing with engine head hence the leak is hard to spot.

best way to find out if theres defo a leak is to fit a fuel pressure gauge inline with the feed hose and see if ahe maintains pressure over a 30 minute period.