High idle speed

[19CDTi]

1.9 120Bhp, 2007

Always idles around 750-800rpm standing still. Last night and this morning it was idling at around 1000rpm. I've made no changes to anything engine-related recently so unsure why it's changed. Not an immediate problem but I'd like to investigate before it becomes one.

Any comments or advice welcome.

Thanks in Advance
Stuart

[tony-1977]

Alternator starting to fail. Mine done this too. Ecu increases idle speed in an attempt to increase the charge from the alternator. Check the voltage at idle

---Sent from my iPhone 4 using Forum Runner.

[19CDTi]

Thanks Tony, coincidentally enough, I just found this thread from a google search
http://www.vectra-c.com/forum/showth...-reading/page2
location-wise it looks like a ****** to replace?

Thanks
Stuart

[19CDTi]

Home from work and all electrics were on their way out!!

Well, since it was p1$$ing down, all I got done tonight was airbox and alternator bolts out - can't even order the new unit until I get the number off the faulty one - the supplier was looking at 105A upwards on his catalogues and said they're all different, even to the same engine....

[tony-1977]

Go for the 120amp

I did, on the advice of Vauxhall and Euro Car Parts

[19CDTi]

Well it's off the car just now, I can get a split new one for £145 which seems the best deal, but if it's the rectifier it may be repairable I'm led to believe, so I'm off to the auto-sparky on Monday morning