UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
Once it starts is there exhaust smoke?
Any codes stored?
Does it have the long crank hard start issue with the engine cold or at operating temp or both?
My suggestion is new spark plugs, verify the battery cranking amps are efficient, use sea foam to fog the intake and combustion chambers, then clean the throttle body. Give those a shot and let me know if it is any better. Also does applying throttle when cold make it start sooner?
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Black plugs means it is running rich. That in connection with the hard start could implicate leaking injectors.
I have offered all I have. I will opt out and let another try.