The head gasket in my nissan wingroad got roasted. My mechanic did gasket overhaul but after that the engine turns over but does not start. Before changing the gasket i had noticed a problem with my speedometer(the stick was not moving). when i plug the diagnostic machine it says something like 'engine communication error'. I am frustrated and genuinely worried. different teams of car electricians have tried to locate where the power could be 'getting lost' without success. some times fuel is being injected into the engine, other times there is no fuel coming into the engine. There is not spark at the plugs!please help. thanks.
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