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2.0lt vauxhall vectra hard to start?

this is a od one the car starts ok in the moring and drives geart but if u stop her and let it sit for an hour so it is hard to start u have to crank it over for a while and starts with a bit of smoke. if she is still hot starts ok its only when it sits for a while ate starts fine when stone cold. i have tryed new leak off pipes, new injecter seals, a non return valve on the fule line. so any ideas would be geartful.
david, March 2010
same problem with mine it was the ecu unit so to warm glow plugs fitted button where cig lighter is problem fixed as new ecu unit about 900

lani, March 2010
might be the egr if it has one or boost pressure from turbo far too high really confused me??

jezza, March 2010
link Click here to see other fixes for Vauxhall Vectra.