Originally Posted by
mickmatt
as above hello cant find intro board i am in u.k and looking for advice and guidance please my son in law bought a 5 year old croosfire a couple of weeks ago last week he called to say wont start jumped him with snap on battery pack and the new alternator was pushing 14.3 volts it looks like original varta battery with daimler chrysler sticker on it everything a.o.k last night went to leave and came back said wont start so out in dark and rain it turned over but no fire into fuse box to fuse for ignition coil looked good swapped with next fuse and it fired up put fuses back to how they were and it fired up again i thought a.o.k to.day driving in outside lane engine dies coasts to side engine warning light and rear brake pad wear light on by the time they phoned me 5 mins the car started and came home i am thinking dodgy connection to ign coil relay if it has one ?under fuse as threr is a line of multiplugs going down and also tired battery dropping voltage leading to ecu coil pack loss of electrics any help appreciated thank you cheers mickmatt
3 things come to mind
1. the Varta battery is most likely at end of life and needs replacing.
2. you might have a CPS ( Crankshaft Position Sensor ) going bad.
3. You should probably search in the below links for the DIY on the "Mystery no start" related to the RCM ( Relay Control Module ) bad solder joints.