earlier on when i started car up the secondary air intake kicked in then the car was well felt like it was misfiring but it wasnt once the Sai turned off car idles lovely again but this 17544 code came up fuel trim lean ?? any ideas lambda sensors are new so wont be them all silicone breather pipes so not them 

It's usually the MAF or a leak

vac leak ill have to get a smoke test 

One of the fiddly little pipes down the front below intake manifold.

Put money on a split in the S pipe under the manifold. If that's split it's almost guaranteed the plastic elbow behind will break when your in there and the y pipe will be shot as well. Do a search on this forum you'll find loads of info. Get all the parts at the same time and save some stress.

Sent from my iPhone using Tapatalk

all replaced silicone pipes now