all right maintained, no grease usage or exuaghst smoke ever,
just started missfiring weakly out of the blue, parts replaced spark plugs. plug wires. all 3 ignition coils firing correct,
replaced fuel pump, snap on engine analyzer says the sensors
are not closing the loopback. any accepted wisdom???
Answers: More than likely the engine coolant heat sensor is bad.
What is the problem beside your vehicle, is it staying in expand loop?
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