pulled upper intake to change coil in clyinder 1 and now have code p0300

Question

oh..i have an 02 nissan maxima had code p0301 changed coil and now have p0300

Answer 1

Did you check/replace the spark plugs? if it have not been serviced it might be a good time too.

Did you confirm the coil was bad? also check for air leaks by spraying brake cleaner near the intake manifold when the car is running and hear or check for RPM change (dont spray brake cleaner on wires or hoses)

Answer 2

ty g37...i changed the upper in take gaskets and found another bad coil..replaced and car running smooth