Question about 2004 Pontiac Grand Am
The diagnostic tool gives a code of 3700.
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Posted on Jan 02, 2017
there are many causes of cylinder misfire, the most common being ignition. plugs or wires being faulty can cause misfire. also faulty or plugged injectors, loss of compression such as blown head gasket.
Posted on Feb 20, 2010
You have to do a cylinder leakage and possibly an injector balance test test to determine what the problem is what those two cylinders.
Posted on May 24, 2010
Tips for a great answer:
Dec 17, 2015 | 2002 Mercury Villager
Check the wire routing in order to ensure that crossfiring is not occurring.
If the misfire occurs when the weather is damp, the problem could be due to worn plug wires.
In order to test for this condition, spray the wires with water. With the engine running, watch for a spark to jump from the wires. If a spark is visible, replace the wires.
If the fuel level is low, contaminants in the bottom of the fuel tank could enter into the fuel metering system.
For more information, refer to Fuel Supply System.
Important: Before clearing the DTCs, use the scan tool to record the Freeze Frame and the Failure Records for reference. This data will be lost when the Clear Info function is used.
Was the Powertrain On-Board Diagnostic (OBD) System Check performed?
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check
Review Failure Records data.
Are there any other DTCs stored?
Go to Applicable DTC Table
Go to Step 3
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A P0300 diagnostic code indicates a "random" or "multiple" misfire.
Unfortunately, P0300 doesn't tell you specifically which cylinders are mis-firing, nor why (code P0301 would indicate cylinder #1; P0302 would indicate cylinder # 2 etc). This means there could be an issue with any number of components/circuits relating to the ignition/combustion circuits.
I would recommend you check for the following:
Sometimes the underlying cause of a random misfire is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold, unmetered air getting past the airflow sensor, or even an EGR valve which is stuck open.
Hope this helps...
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