I have 2003 350z that has cold air induction, plenum spacer, berk HFC's, Milltek exhaust and I has an Up Rev.
The past few weeks I noticed that when I start the car first thing in the morning the rev counter starts bouncing between 300rpm and 1.5k rpm. The car seems on the verge of cutting out, a couple of times it has done so and yesterday it took a lot of cranking to get it started.
The car has been serviced about 4 months ago, its had new plugs and a new battery within the past few months and I only use V-Power fuel. Apart from the cold start issue the car runs fine.
Can anyone point me at what I should be looking at to solve the issue?