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my 98 Nissan Altima engine light flashing off and on and knocking
I have a 98 Nissan Altima I just got done 3days ago replacing the valve Pan cover gasket spark plugs and spark plug wires and even change the oil and oil filter before i went back over the road . Now she tells me shortly after I left she noticed the check engine light cap coming off and on now the motors knocking. Does anyone now what can be the problem ? It never done any of this till after I changed everything