hi there,
couple weeks ago my 98 accord dx 4 cyl was cranking but wouldnt start so i took it to a shop and i was getting no spark they put on a new distributor and cap and rotor got it back and it was good for one day then it did it again. took it back and they said it was the plugs so they replaced them and put in a coolant temp sensor and i got it back and it ran great. 30 miles later my CEL came on and the codes i got are P0300, P0301, P0303, P0420. i replaced the plug wires cleared the CEL and it came back about 50 miles later. i dont know what to do. i dont want to take it back to them cause if they fix it theyll cause something else to happen. anyone got any ideas? any help would be great. thanks

 

Could be a faulty replacement distributor.