Lately our old bus has been getting very shuddery whilst cranking. It's worse on frosty mornings but even does it when starting a warm engine. My first thoughts were engine mounts, especially the bottom one, but I got the garage to take a look at them during the last service and they said they were ok. I replaced the glow plugs 2½ years ago at about 90K, it's now on about 112K. Other thoughts are slow cranking speed due to tired battery or voltage loss somewhere. I wondered about the anti-shudder valve but thought that only came into action when switching off and it doesn't shudder noticeably then.
Anybody have any thoughts about this before I go down the route of getting codes read? Bearing in mind it's age and mileage I don't feel inclined to spend shedloads of cash on it so if it's going to be expensive I'll live with it as it is. I'd welcome suggestions, especially from anyone who has had a similar problem.