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do diesel engines have Idle Air Control Valve?

My problem is that sometimes when my Astra G tdi 1.7 2002 is idling(is not in gear) the RPM go to 5000-6000, width out me stepping on the gas pedal, so the engine it accelerates on its own while ...
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Opel Frontera Electrical Problem - can't access diagnosics

I have an Opel Frontera 1999 2.2 Diesel. It refused to turn over a couple of years ago and it's taken me this long to get to doing anything about it. I was advised that it was something wrong with the ...