The 7.05am Taita service in the Hutt Valley was cancelled this morning after an "operational issue", Tranz Metro said on its website.
The 7.19am Taita service was delayed by up to 10 minutes "due to a mechanical issue", and the Capital Connection service was running up to 15 minutes late "due to operational issues".
A mechanical fault led to yesterday's 7.27am and 8am Taita services being cancelled.
Also yesterday, a signal and points failure around 11am saw trains replaced by buses between Plimmerton and Paraparaumu.
A telecommunications fault near Trentham, in the Hutt Valley, caused delays of up to 40 minutes on the Hutt Valley line between 6.50am and 8.10am yesterday.
The same fault also led to the cancellation of the 8.10am Plimmerton train, on the main trunk line north.
They were the latest of numerous faults in recent months which had coincided with a drop in commuter numbers.
