Spanner light, juddering and rev counter does not work

2001 Vauxhall Zafira 2.0
Car: Vauxhall Zafira
Year: 2001
Variant: 2.0
Categories: Running Rough, Starting & Power Loss
Car Starts, run for a while then the spanner light comes on, car starts hunting and the rev counter goes to zero, mostly around town. It comes and goes. Take it on the motorway and it seems because of the higher speed it goes back to normal. Have filled tank with top grade diesel and red ex but this has not helped.
Problem added: Apr 28, 2015 (8 years ago)
I'd concern myself with the rev counter,
many modern diesels relay on RPM signal for correct injection function.
No signal or incorrect signal will give most if not all your symptoms.
Answered Apr 28, 2015 (8 years ago)

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