Fuel injector: Verify the fuel injector for cylinder 7.
Compression: Measure the cylinder compression. If it's low, further checks may be needed.
Valve issue: Check the cylinder valves for proper seating.
Ignition wires: Ensure the ignition wire for cylinder 7 is in good condition and properly connected.
Distributor: Check the internal components of the distributor and the pick-up coil.
Computer Module: Some models may be computer controlled. If all other components check out, have the engine control module tested.
Worn engine parts: If all else fails, internal engine components like piston rings or head gaskets may be worn and need replacement.
It's always advisable to have a qualified mechanic diagnose the issue and perform the necessary repairs.
