The car: 3.2 manual estate. Been parked up for 3 years. Fresh fuel added then driven 77 miles. Was fine initially, albeit with lifter noise, but by end of journey car cutting out and missing, eventually stalling. Won't rev past 4k.
Codes 0340 and 0300.
Car has since been sat a week.
Coil packs off and plugs out. 135 pack as new, plugs fouled and stink of fuel. 246 pack shot and plugs fouled no smell of fuel.
Plugs cleaned and refitted along with v good 246 replacement pack. Known good cam sensor also fitted.
Can of lifter treatment added.
Car then started and allowed to idle. Still very tappety but improving slightly as it warmed up. All the lifter noise is from the rearmost two tappets on 5 (1 exhaust and 1 inlet) I suspect that with a couple of oil changes and some more treatment these will eventually settle down.
As the car warmed up it started to mis. Revs applied and whilst it revs OK, still no more than 4k. Lift off and it splutters. Unplugging MAF made no difference. Repeat and it stalls. Codes 0340 and 0300.
135 flooding. Pull fuse 18 and it starts fine but idles rough when warm. Start WOT and again starts fine and revs as soon as running.
Current thinking is that the crank sensor is starting to breakdown causing an intermittent failure which shuts the engine down mid flow.