code P0300

2005 CHEVROLET MALIBU
59 MILES • 4 CYL • FWD • AUTOMATIC
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EDHERRERA99
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i got code P0300, i installed new spark plugs w/boots and it still misfires....i took it to the dealership repair shop and they said it was the ignition coil.....so i replaced that and the problem still occurs.....where can i look next ?
Jan 22, 2011 at 9:46 PM
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RASMATAZ
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Random misfire are usually caused by vacuum leaks and bad fuel.
Jan 23, 2011 at 1:33 PM
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EDHERRERA99
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i pulled the spark plugs out to check if they were the right gap, and found out that the side plugs were pitch black and the two in the middle were nice and clean......does this lead me to think its the fuel injectors ?
Jan 23, 2011 at 2:27 PM
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RASMATAZ
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Check the sparkplugs, compression and injectors for those cylinders
Jan 23, 2011 at 7:29 PM
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EDHERRERA99
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do i check the clean spark plugs or black spark plugs...sry ?
Jan 24, 2011 at 10:28 PM