Quote:
Originally Posted by Falmouthboy
OK - Daft question, but how is my DPF ever going to regenerate. I read everywhere that I need to go for a good 30 minute run at above 2500 RPM, however, to do this in a 330d Auto you need to be tanking it at 90 MPH. That can't be right - do I need to lock it in 4th and do a 30 min run? Not easy on Cornish roads!
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If the regenerations are working correctly you won't need the high revs and or distance.
The autobox will be controlled by the ECU, just don't fight it and put it in a higher gear manually. I find it will want about 1,800rpm, during the first stages of a regeneration. Doesn't up change as normal, during a regen. But if you are cruising at around 60mph, it will drop into 6th during the regeneration.
I was discussing regenerations with one of BMW's technical managers, he said if you notice a regeneration "just give it its head". So if I'm driving locally and notice a regenertion start and get out on the open road, I'll let it cruise in 5th to assist an efficient regeneration. Mine usually are complete after about 8 miles, gearbox back to normal.
I think the real issue is, if there are problems with regenerations, then a harder drive over distance is required, to ensure the regeneration can be successful.
HighlandPete