random misfires -- what can cause this -- what can fix this??? on 1997 Chrysler Cirrus

started with loose gas line at tank. have not been able to get these codes gone since!
have given the car a complete tune up -- wires and plugs -- cap and rotor...MISFIRES
on four plugs still come back! MAYDAY, NEED TO SELL THIS CAR!

OBA

Asked by for the 1997 Chrysler Cirrus
Hello this seems like the ground for the distributor that needs to be repaired at the left front fender or the distributor may need to be replaced.
2 answers 2 comments
Is it only P0300 or do you have more?
at first it was several--then, only the one, 300---and,
once i replace the wire--the problem went away long
enough to smog--thereafter, four more erupt and continue
to do so--even after i clear the codes--over and over

paul here
Check the plugs, crankshaft position sensor, camshaft position sensor, etc. They all can set a P0300. Has the car really been serviced?