I Have A W Plate Focus 18tdi . The Glow Plug Light Comes On When Driving , The Revs Drop To Idle And It Will Not Rev. If Engine Is Turned Off And Then Re Started All Is Ok , Untill It Happens Again . Any One With Any Idea. THANKS
Try checking wiring on back of alternator {lose plugs,dirt } i had a problem with my crusier glow light coming off and on while driving it was the plug making and braking contact give it ago
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