M MavericK5L New Member Mar 18, 2003 111 0 0 Montreal Jun 4, 2004 #1 Jun 4, 2004 #1 Do bad spark plug hurt my gaz milage ? I install ngk sparg plug last summer and didn't change a thing since I get it out of the garage this year. Is it a good thing to change them each begining of season and will it help on the gaz millage ? Thanks
Do bad spark plug hurt my gaz milage ? I install ngk sparg plug last summer and didn't change a thing since I get it out of the garage this year. Is it a good thing to change them each begining of season and will it help on the gaz millage ? Thanks
ECU5.0 Banned Jan 10, 2004 1,803 1 0 raleigh, nc Jun 4, 2004 #2 Jun 4, 2004 #2 it definetly would hurt the change them
