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[V8S]

Just in case you haven't fixed this yet, I had trouble with starting my Omega 2.2 DTi a few months ago. It turned out to be the earth on the starter motor not being great. It would turn the engine over but not fire.

Electrician put a new earth on the engine block and all has been fine since. It also cured a problem with the temperature gauge saying it was red hot when it wasn't.

[Agemo]

Hmmm, interesting about the starter earth, it starts OK, but the idle is not right. Anything over 900 RPM & it runs perfect. Anyone know of any tests that can be done?
 

[Seth]

Just back from a short holiday with the caravan in tow.

My warm-starting problem has disappeared after I changed the battery ...... !!!!!!!
The old battery was only just 'below par' and the alternator and earthing was fine.

Two factors come into play here:
1. The new battery positively whizzes the engine turn-over, so although slow warm-starting is probably still there, due to vastly increased cranking speed, the tractor bursts into life quickly.
2. Due to increased battery power, the ECU has experienced some sort of re-map, thus allowing easier warm-starts.
What d'ya think, chaps ..... ?

[chartz]

This is exactly it.
The other day my son forgot to turn off the backlight and it stayed like that for two days. Cold startup was only just okay, and warm startup was difficult. It remained so for a couple of days, and it was only when the battery was again fully charged that startup operation returned to normal.
A discharged—or bad for that matter—battery will indeed cause warm startup issues.