hi, has anyone had starting problems its a 2005 s40 2L diesel sometimes it starts very lumpy like running on three pots turn it off and try again its fine runs great, i am thinking a glow plug down. has anyone had the same probs. thanks

 

Sounds like a bad connection / corrosion at glow plug. If you had a bad glow plug it would fail all the time.Make sure you have proper voltage at all plugs, check for voltage drop too.