have checked all the electricla connections ,ECM, FUEL PUMP,RELAYS ,SENSOR. no problem. The car take long to start and after starting emmits balck smoke
i have an ford ikon. Its got a starting problem.petrol overflow. checked all electrical connections.Found okay
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check to see if you have the smell of oil in the gas.
starting problem could be your starter.
if you smell oil with your gas check your head gasket on your engine, see if you have any leaks.
but black smoke is not a good sign.
you have checked the fuel pump and checked the fuel presure and it seems ok, I would start with the basics like the spark plugs and the wire, it could be a timming problem, even an o2 sensor can cause problem in fuel mixture which would result in black smoke, do you idle rough? in idle does the rpm fluctuate? i would suggest start checking with the 1. plugs & wires, 2. ignition coil, 3. o2 sensors and timming. on what you telling that you have checked my gut feeling it is a timming issue.
good luck