Question about 2000 Chevrolet Silverado

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2000 chevy silverado cylinder 2 is misfiring

The vehicle is sputtering when I drive and it doesn't have much power at all.
The service engine light comes on and when I put a diagnostic scanner on it, it sends a message P0302 which says cylinder 2 misfiring.

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  • Anonymous Jan 13, 2009

    i have a chevrolet silverado 2000 and it says tha multiple misfires . but the service engine light goes on for a while then turns on again .... i have changed the spark plugs , wires, roater but cant find th problem?

  • Anonymous Jan 26, 2009

    I have the same problem but with a 2001 Chevy Silverado

  • Anonymous Mar 31, 2014

    service engine light keeps coming on and mechanic tested it and said that it had a cylinder misfire so what causes that

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Hello there, I would start by removing the plug from cylinder #2 and check it condtion, I would then verify that spark is or is not getting to that cylinder. If spark is present and the plug looks good, turn the engine over and verify both of these with the plug laying on the valve cover. So if coil is good and plug is good, then it leaves fuel or fuel control issue. A faulty or clogged injector could cause this issue. Let me know how you make out, I'd be glad to assit you farther if need be. Thank you for using fixya.com

Posted on Sep 21, 2008

  • audieG Nov 17, 2011

    Chang the wires

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The following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Condition/Concern:
Check Engine Light with a P0300 due to 2 - 4 cylinders misfiring on the same bank of the engine. DTCs P0171, P0172, P0174 or P0175 may also set for the misfiring bank.

Recommendation/Instructions:
If the published misfire diagnostic does not isolate the cause, perform the following suggestions as necessary:
  • Perform a fuel injector balance test for all 8 cylinders. If a fuel injector concern exists, it is possible to misfuel an entire bank of the engine, causing multiple cylinders on the same bank to misfire even though the root cause is a single fuel injector.
  • Inspect O2 sensor connections on the misfiring bank for corrosion or water intrusion. If water intrusion is found on the right bank, it may be due to the AC Evaporator Condensation dripping onto the O2 sensor harness. If this condition is found, reposition and shield the harness to prevent a repeat concern and repair the connections.
  • Check for excessive exhaust backpressure using the restricted exhaust diagnosis.
  • Swap the Position 1 O2 sensors side to side to see if the misfires move to the other bank of the engine. If so, replace the O2 sensor.
Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

NOTE: GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition.

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