I like the Autometer Ultra Lite gauges personally, I ripped out all my vdo gauges.... I will NEVER buy VDO EVER again...
My oil pressure gauge (VDO) was off by almost 20psi, volt gauge (VDO) was off by 1.5 volts and coolant (VDO) was off by 10... Installed Autometer gauges using the same wiring I had put in for the VDO's and they were spot on...
Scott
Were they electronic or manual? If electronic, were the grounds enough and good contact. The electronic ones are known to be iffy when the ground connections are shotty.