Misfire: Difference between revisions

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In the case of a steady misfire, isolating the misfiring cylinder is the first step in diagnosing the problem.  
In the case of a steady misfire, isolating the misfiring cylinder is the first step in diagnosing the problem.  


'''Items that can cause a misfire:'''




'''Items that can cause a misfire:'''


===Spark Plugs===
===Spark Plugs===
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[[Coil packs]]
[[Coil packs]]


===Idle Air Control Valve===
===Throttle Position Sensore===
 
[[Idle Air Control Valve]]  (IACV)


[[Throttle Position Sensor]]


===Lambda Sensor===
===Lambda Sensor===


[[Lambda sensor]]
[[Lambda sensor]]


===Head Gasket Failure===
===Head Gasket Failure===

Revision as of 23:03, 6 May 2007

Misfire

Steady Misfire

In the case of a steady misfire, isolating the misfiring cylinder is the first step in diagnosing the problem.


Items that can cause a misfire:


Spark Plugs

Spark plugs

Coil Packs

Coil packs

Throttle Position Sensore

Throttle Position Sensor

Lambda Sensor

Lambda sensor

Head Gasket Failure

A spark plug that shows heavy whitish to brown deposits may indicate a coolant leak either past the head gasket or through a crack in the combustion chamber. This type of problem will only get worse and may soon lead to even greater problems if the leak isn't fixed. Coolant makes a lousy lubricant and can cause ring, cylinder and bearing damage if it gets into a cylinder or the crankcase.

Head gasket failure