Troubles starting, engine overheating, problems accelerating what could it be
The problems you list can all be individual issues or related to one thing. A cracked head gasket, cylinder head, intake manifold and/or gasket can cause all of these symptoms. On their own, hard starting can be a fuel or ignition issue. Overheating can be anything in the cooling system. A thermostat that is not opening, a water pump that is not circulating the coolant, or a restriction in the cooling system like a clogged radiator. Problems accelerating can be due to any of these things or even a transmission issue. The best route to take is have a certified technician look into the overheating and other issues to determine whether they are all related or individual.
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