I have a problem with my Nissan Primastar DCi100 which also relates to Vauxhall vivaro. Starting is excellent. `Problem is after driving for 5 to 10 minutes. If vehicle is stopped and motor turned off. Restarting no problem but there is NO acceleration. If I wait for 5 minutes acceleration comes back . Or drive down the road in first then second acceleration comes back. Leave it for the fan to kick in acceleration comes back . Diagnostic test shows no fault. Have cleaned the EGR valve which was filthy. Picks up slightly quicker but has not resolved the problem. Despèratly need help. Year of vehicle 2005
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