Question about 1997 Chevrolet Blazer

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Well the check engine light is on and is coming up a misfire on one of the cylinders what needs to be fixed

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I would suggest replacing the spark plugs and plug wires. Especially on the cylinder that is misfiring. But if you don't replace all of the plugs and wires. The problem will probably move. Also a new cap and rotor is a good idea. But a misfire means that the spark plug did not fire.

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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Missing,viborating


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
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The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
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P0300 - Random/Multiple Cylinder misfire detected
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P0302 - Cylinder 2 misfire detected
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a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
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The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

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Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
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