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2007 Chevrolet Silverado code reading

Tiny
PATACAKE
  • MEMBER
  • 2007 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
It has a code reading po300 (misfire) but it doesn't say witch cyl. Can you give me a direction where to start. Thank you
Tuesday, March 25th, 2014 AT 1:57 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Common Problems That Trigger the P0300

Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable)
Incorrect ignition timing
Vacuum leak(s)
Low or weak fuel pressure
Improperly functioning EGR system
Defective Mass Air Flow Sensor
Defective Crankshaft and/or Camshaft Sensor
Defective Throttle Position Sensor
Mechanical engine problems (i.E.†Low compression, leaking head gasket(s), or valve problems
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Tuesday, March 25th, 2014 AT 2:27 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it's a 4.8L it may be a bad cam andlifters.
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Tuesday, March 25th, 2014 AT 3:28 PM

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