2002 Cadillac DeVille Q&A

2002 Cadillac DeVille Question: rough idle

4.6 noth star i change the plugs and wires crank sensors fuel filter code PO300 mutiple mis fire what else could this be -
Answer 1
Here is a ton of great information about the P0300 code: http://repairpal.com/OBD-Code-P0300 -
Answer 2
Try the Vacuum Hose's or Brake Booster. -
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